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Ajay
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- Latest Answer: 8 months ago
- In: Tuition foundation
What is habitat-
What is habitat?
Ajay
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- Latest Answer: 8 months ago
- In: foundation
Example of cereals
- Chickpea and kidney bean
- Wheat and rice
- Wheat and moong bean
- Kidney beans and rice
Ajay
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- Latest Answer: 8 months ago
- In: foundation
Which part of the plant is cabbage?
- Root
- Fruit
- Leaves
- Flower
Ajay
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- Latest Answer: 8 months ago
- In: foundation
This food is obtained from animals
- Sugar
- Honey
- Jaggery
- Jam
Ajay
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- Latest Answer: 8 months ago
- In: foundation
Why do we need food?
- For body growth
- To get energy
- To increase immunity
- All of these
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
Dog is-
- Carnivores
- Omnivore
- Scavenger
- Herbivores
Ajay
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- Latest Answer: 8 months ago
- In: foundation
Cow is a/an-
- Carnivore
- Producer
- Herbivore
- Omnivore
Ajay
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- Latest Answer: 8 months ago
- In: foundation
Which one of the following is an omnivore?
- Cockroach
- Lion
- Deer
- Green plants
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
Which of these eat food digested by other animals?
- A cow
- A pig
- Cockroach
- A tapeworm
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
Mineral in body which helps in absorption of nutrients and maintain balance of fluids in body is -
- Sodium
- Iodine
- Chromium
- Boron
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
Lipids that are found in food are made up of-
- Fatty acids
- Amino acids
- Carbolic acids
- Carbonic acids
Ajay
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- Latest Answer: 8 months ago
- In: foundation
Excess intake of fatty food causes-
- Obesity
- Weakness
- Loss of weight
- All of these
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
A very good source of animal pritein is-
- Fish
- Honey
- Sugarcane
- Goat
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
Which of the following is not a source of milk?
- Cow
- Goat
- Sheep
- Pig
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
An oil which is rich in vit D
- Cod liver oil
- Mustard oil
- Sunflower oil
- All of these
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
A disease not arising due to vitamin deficiency is called-
- Scurvy
- Beriberi
- Rickets
- Kwashiorkor
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
Processed foods generally lack -
- Fat
- Sodium
- Carbohydrates
- Vitamins
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
Which of these organism does have teeth?
- Parrot
- Eagle
- Mosquito
- Tapeworm
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
Body requires food for -
- Growth
- Taste
- Cell division
- Increase immunity
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
Edible part obtained from roots are-
- Turnip
- Raddish
- Potato
- Cabbage
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
Which of the following ia an edible stem?
- Radish
- Potato
- Carrot
- Apple
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
Which part of the plant is turnip and carrot?
- Root
- Stem
- Leaves
- Flower
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
The product obtained only from plants is-
- Chicken
- Ghee
- Rice
- Milk
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
Which one of the following is pulse?
- Gram
- Wheat
- Tea
- Kali mirch
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
Which one of the following is not an animal product?
- Cheese
- Honey
- Butter
- Onion
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
The disease caused by the deficiency of iron is-
- Anaemia
- Dysentry
- Chickenpox
- Malaria
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
The mineral which controls the functioning of thyroid is-
- Phosphorous
- Calcium
- Magnesium
- Iodine
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
Rickets is caused by the deficiency of -
- Vitamin A
- Vitamin B1
- Vitamin C
- Vitamin D
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
The disease caused by the deficiency of iodine is -
- Anaemia
- Goiter
- Chickenpox
- Swine flu
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
Human beings eat rice,chapatti as well as meat, so they are-
- Herbivores
- Carnivores
- Insectivorous
- Omnivores
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
Nutrient content of daal mainly includes
- Fat
- Minerals
- Carbohydrates
- Proteins
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
Iodine is main component of
- Protein
- Thyroxin
- Carbohydrates
- All of these
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
____ is essential for forming hawmoglobin in the blood.
- Calcium
- Iron
- Phosphorus
- Magnesium
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
A person with bleeding gums should daily take
- Milk
- Carrots
- Lemons
- Butter
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
The animal which eat only plants are known as-
- Carnivores
- Omnivores
- Herbivores
- Insectivorous
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
1 gram of Carbohydrates comsists_____ amount of energy
- 4 Kcal
- 6 Kcal
- 7 kCal
- 8Kcal
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
Which of the following is a protective food?
- Milk
- Oils and fats
- Fruits
- Cereals
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
Calciferol is the name of
- VitA
- VitB
- VitD
- VitE
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
Which part of plant makes the food?
- Leaf
- Stem
- Flower
- Both(1) and (2)
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
What is an another name for sprout?
- Condensation
- Evaporation
- Germination
- Transpiration
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
Which of the following is a creeper?
- China rose
- Gulmohur
- Pumpkin
- Mango
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
A plant having parasitic roots
- Radish
- Dodder
- Rice
- Banyan
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Fiborous roots are present in-
- Pea
- Carrot
- Wheat
- Turnip
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following has a tap root?
- Maize
- Wheat
- Pea
- All ot these
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following possesses
- Rice
- Wheat
- Marigold
- Both (1) &(2)
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
The thick,woody stem of trees-
- Node
- Trunk
- Scale
- Internode
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 8 months ago
- In: foundation
Dry scale leaves are found in-
- Sweet potato
- Onion
- Ginger
- Radish
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Human beings eat rice,chapatti mainly includes-
- Herbivores
- Carnivores
- Insectivorous
- Omnivores
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Write a fraction in their lowest terms:
- 0.07
- 24.075
- 0.625
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Change to decimals:
- 5/8
- 17/40
- 5 13/64
- 4 31/80
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Write in decimal notations:
- Thirty three hundredths
- Five hundred eighty three thousands
- Ninteen hundred thousands
- Twenty eight and seventeen ten thousands
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Represent the following on number line:
- 4.5
- 2.8
- 6.1
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Express
- 75 paisa as rupees
- 54 rupee 8 paise as rupees
- 348 kg 36g as kg
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Which is greater of 48.23 and 39.35?
Which is greater of 48.23 and 39.35
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Put these numbers in order of size , smallest first:
3.3, 3.03, 0.333, 0.03, 0.303, 3.003
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Put these numbers in order of size, starting with largest
0.786, 0.706, 0.760, 0.756
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Find the product of 9.2 and 6.07
Find the product of 9.2 and 6.07
Ajay
300 Points
Ajay
300 Points- khushi (1250) Points
- Latest Answer: 7 months ago
- In: foundation
What Fraction of a day is 9 Hours?
What Fraction of a day is 9 Hours?
Ajay
300 Points- khushi (1250) Points
- Latest Answer: 7 months ago
- In: foundation
Standard form of -60/72?
Standard form of -60/72?
Ajay
300 Points- khushi (1250) Points
- Latest Answer: 7 months ago
- In: foundation
Find 1/6 of 30 Hours ?
Find 1/6 of 30 Hours ?
Ajay
300 Points- khushi (1250) Points
- Latest Answer: 7 months ago
- In: foundation
12/5 is greater than 13/5?
12/5 is greater than 13/5?
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Find the value of the expression 25x²+9y²+30xy. When x=8 and y=10.
Sol.
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Find the value of the expression (81x²+16y²-72xy), when x=2/3 and y=3/4.
- Sol.
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
What least value should be added to the following algebric expression to make them perfect square?
36x²-65xy+ 25y²
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Show that
- (4x+5y)² - (4x-5y)²= 80xy
- (a-b) (a+b) +(b-c)(b-c)+ (c-a)(c-a)= 0
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Factorise each of the following
- 3x²y-6xy²
- 6ab-9bc
- 25x²+35x³y-20xy³
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Express each of the following rational numbers to the lowest form.
(i) 12 /16
(ii) 60 /72
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Represent
(a) 2 /5
(b) –7 /3 on the number line.
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the two rational numbers 5/ 7 and and 3 /5 is greater ?
Sol.
Ajay
300 Points
Ajay
300 Points
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Find the additive inverse of :
(i) 5 /9
(ii) 9 /-11
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Subtract
(i) -5 /7 from 2 /5
(ii) 9 /16 from 7 /24
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
What number should be added to 7 /8 to get 4 /9 ?
Sol.
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Find the reciprocal of each of the following :
(i) – 8
(ii) 5 /16
Ajay
300 Points
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Find 3 Rational numbers between 2/ 1 & 3/ 1 .
Sol.
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Find 5 rational number between -3/ 5 and 1 /4 .
Sol.
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
. On dividing 4150 by certain number, the quotient is 55 and the remainder is 25. Find the divisor.
Sol.
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following is prime
(A) 141 (B) 241 (C) 341 (D) 441
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following natural numbers is neither prime nor composite.
(A) 0 (B) 1 (C) 2 (D) None
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
The reciprocal of a negative rational number :
(A) is a positive rational number
(B) is a negative rational number
(C) can be either a positive or a negative rational number
(D) does not exist
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Multiplicative inverse of 3 /5 is
(A) 1
(B) 0
(C) -3 /5
(D) 5 /3
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
The product of a non – zero rational number with an irrational number is :
(A) Irrational number (B) Rational number (C) Whole number (D) Natural number
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
How many rational numbers exist between any two distinct rational numbers ?
(A) 2 (B) 3 (C) 11 (D) Infinite
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Rational number between 1 and 2
(A) 5 /6
(B) 6 /5
(C) 3 /7
(D) 7 /3
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
FILL IN THE BLANKS
All natural numbers that have one and itself as their only 2 distinct factors are ________.
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
FILL IN THE BLANKS
Additive inverse of 5 is ____ ___.
Ajay
300 Points
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
TRUE / FALSE
Prime number can also be negative integers .
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: Tuition foundation
TRUE / FALSE
Reciprocal of a positive rational number can either be negative or positive.
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
MATCH THE COLUMN
Column–I Column–II
(A) 2/3 1/2. (p) 1/2
(B) 6/7–1/2. (q) 4/3
(C) 2/3+4/5. (r) 6/5
(D) 42. &nbs [Read More]
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
VERY SHORT ANSWER TYPE
Smallest natural number is
Ajay
300 Points
Ajay
300 Points
Ajay
300 Points
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Evaluate
- (502)²-(498)²
- (8.6)²-(1.4)²
Ajay
300 Points
Ajay
300 Points
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following statements is INCORRECT for rational numbers?
A) The rational number O is the additive identity for rational numbers.
(B) The rational number 1 is the multiplicative identity for rational numbers
(C) Subtraction is associative for rational numbers.
&n [Read More]
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Closure property for rational numbers is satisfied in case of _______
(A) Addition
(B) Subtraction
(C) Multiplication
(D) All of these
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
The difference between the place value and the face value of 6 in the numeral 856973 is_________.
(A) 973
(B) 6973
(C) 5994
(D) None of these
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following numbers does NOT have a multiplicative inverse?
(A) -1/3
(B) 0
(C) 1
(D) 3
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: Tuition foundation
If the division N÷ 5 leaves a remainder of 3, what might be the ones digit of N ?
(A) 2 (B) 3 (C) 4 (D) 6
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
A rational number can be expressed as a terminating decimal if the denominator has factors
(A) 2 or 5 (B) 3 or 5 (C) 2, 3 or 5 (D) None of these
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
If a number is divided by 45, then the remainder is 32. if the same number is divided by 15, then the remainder is
(A) 2 (B) 3 (C) 16 (D) 4
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
On dividing a number by 999, the quotient is 366 and the remainder is 103. The number is :
(A) 364724 (B) 365387 (C) 365737 (D) 366757
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
The number 2.525252........ can be written as a fraction, when reduced to the lowest term, the sum of the numerator and denominator is:–
(A) 7 (B) 29 (C) 141 (D) 349
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
If a and b are positive integers, then which of the following is correct?
A) a + b is rational
(B) a – b is a positive integer
(C) a /b is irrational
(D) None of these
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
There are four prime numbers written in ascending order. The product of the first three is 385 and that of the last three is 1001. The last number is
(A) 11 (B) 13 (C) 17 (D) 19
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Choose the rational number which does not lie between rational numbers 3/5 and 2/3
(A) 46/75
(B) 47/ 75
(C) 49/75 (
D) 50/75
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Let x, y and z be distinct integers where x and y are odd and positive, and z is even and positive. Which one of the following statements cannot be true ?
(A) (x – z)2y is even
(B) (x – z)y2 is odd
(C) (x – z)y is odd
(D) (x – y)2z is even
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
Closure property for rational numbers is satisfied in case of _______
(A) Addition
(B) Subtraction
(C) Multiplication
(D) All of these
Ajay
300 Points- Mahak (11300) Points
- Latest Answer: 7 months ago
- In: foundation
A rational number can be expressed as a terminating decimal if the denominator has factors
(A) 2 or 5 (B) 3 or 5 (C) 2, 3 or 5 (D) None of these
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
The process by which plants take in carbon dioxide from the atmosphere is:
a) Photosynthesis
b) Respiration
c) Transpiration
d) Assimilation
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following is NOT a part of the human digestive system?
a) Mouth
b) Stomach
c) Heart
d) Large intestine
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
The loss of water in the form of vapor from the aerial parts of plants is called:
a) Transpiration
b) Respiration
c) Perspiration
d) Diffusion
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
The oxygen required for aerobic respiration is carried to the cells by:
a) Red blood cells
b) White blood cells
c) Plasma
d) Platelets
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
The heart pumps oxygenated blood to the body through the:
a) Pulmonary vein
b) Aorta
c) Pulmonary artery
d) Vena cava
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following is a major organ involved in excretion in humans?
a) Liver
b) Kidney
c) Lungs
d) All of the above
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
The enzyme responsible for breaking down proteins in the stomach is:
a) Amylase
b) Pepsin
c) Trypsin
d) Lipase
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
The end products of photosynthesis are:
a) Carbon dioxide and water
b) Oxygen and glucose
c) Oxygen and water
d) Glucose and carbon dioxide
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
Which type of blood vessel carries oxygenated blood to the heart?
a) Pulmonary artery
b) Pulmonary vein
c) Aorta
d) Vena cava
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
The process by which an organism maintains a stable internal environment is known as:
a) Respiration
b) Homeostasis
c) Digestion
d) Metabolism
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following is the correct sequence for the passage of food in the human digestive system?
a) Mouth → Small Intestine → Stomach → Large Intestine
b) Mouth → Stomach → Small Intestine → Large Intestine
c) Stomach → Mouth → Small Intestine → Large Intestine
d) Large Intesti [Read More]
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
In humans, the process of breathing involves:
a) Inhalation and exhalation of gases
b) Exchange of gases in the alveoli
c) Both a and b
d) Neither a nor b
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
Water and minerals are absorbed by the plant through:
a) Leaves
b) Stem
c) Roots
d) Flowers
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
The male gamete in plants is:
a) Ovule
b) Pollen
c) Egg cell
d) Anther
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following carries deoxygenated blood to the lungs?
a) Pulmonary artery
b) Pulmonary vein
c) Aorta
d) Vena cava
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
The tissue responsible for transporting food in plants is:
a) Xylem
b) Phloem
c) Epidermis
d) Pith
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following hormones regulates metabolism in the body?
a) Insulin
b) Thyroxine
c) Adrenaline
d) Testosterone
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following is a nitrogenous waste excreted by humans?
a) Urea
b) Ammonia
c) Uric acid
d) All of the above
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
During the night, plants:
a) Do not respire
b) Only undergo photosynthesis
c) Respire and release carbon dioxide
d) Only undergo respiration and release oxygen
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
The diaphragm contracts and moves downwards during:
a) Exhalation
b) Inhalation
c) Digestion
d) Circulation
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following is an example of a combination reaction?
-
a) 2NaCl→2Na+Cl2\text{2NaCl} \rightarrow \text{2Na} + \text{Cl}_22NaCl→2Na+Cl2
-
b) H2+O2→H2O\text{H}_2 + \text{O}_2 \rightarrow \text{H}_2\text{O}H2+O2→H2O
-
c) CaC [Read More]
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
In a redox reaction, which of the following occurs?
-
a) Reduction and oxidation occur simultaneously
-
b) Only oxidation occurs
-
c) Only reduction occurs
-
d) Neither oxidation nor reduction occurs
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following is a product of the reaction between an acid and a base?
-
a) Water and Salt
-
b) Oxygen
-
c) Carbon dioxide
-
d) Hydrogen gas
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
What type of reaction is represented by the equation NaOH + HCl → NaCl + H 2 O NaOH+HCl→NaCl+H 2 O?
-
a) Decomposition reaction
-
b) Neutralization reaction
-
c) Displacement reaction
-
d) Combination reaction
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
What is formed when magnesium reacts with oxygen?
-
a) Magnesium hydroxide
-
b) Magnesium oxide
-
c) Magnesium nitrate
-
d) Magnesium chloride
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following reactions is an example of a decomposition reaction?
-
a) 2NaCl→2Na+Cl2\text{2NaCl} \rightarrow \text{2Na} + \text{Cl}_22NaCl→2Na+Cl2
-
b) H2+O2→H2O\text{H}_2 + \text{O}_2 \rightarrow \text{H}_2\text{O}H2+O2→H2O
-
c) CaO [Read More]
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following is a characteristic of an exothermic reaction?
-
a) Absorbs energy from the surroundings
-
b) Releases energy to the surroundings
-
c) No energy change
-
d) Requires a catalyst
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following represents a displacement reaction?
-
a) Zn+CuSO4→ZnSO4+Cu\text{Zn} + \text{CuSO}_4 \rightarrow \text{ZnSO}_4 + \text{Cu}Zn+CuSO4→ZnSO4+Cu
-
b) H2+O2→H2O\text{H}_2 + \text{O}_2 \rightarrow \text{H}_2OH2+O2→H2O
[Read More]
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following is true for a combustion reaction?
-
a) It involves oxygen and releases energy
-
b) It involves the breaking of bonds and absorbs energy
-
c) It involves the formation of a precipitate
-
d) It results in [Read More]
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following substances is not produced during the combustion of methane ( CH 4 CH 4 )?
-
a) Water
-
b) Carbon dioxide
-
c) Oxygen
-
d) Heat
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
What is the product of the reaction between an acid and a carbonate?
-
a) Water
-
b) Salt and carbon dioxide
-
c) Salt and hydrogen
-
d) Oxygen
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
What is the name of the salt formed when hydrochloric acid reacts with sodium hydroxide?
-
a) Sodium chloride
-
b) Sodium sulfate
-
c) Sodium acetate
-
d) Sodium nitrate
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following is an example of a double displacement reaction?
-
a) NaOH+HCl→NaCl+H2O\text{NaOH} + \text{HCl} \rightarrow \text{NaCl} + \text{H}_2\text{O}NaOH+HCl→NaCl+H2O
-
b) CuSO4+BaCl2→BaSO4+CuCl2\text{CuSO}_4 + \text{BaCl}_2 \rightarrow \text{BaSO}_4 + \t [Read More]
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
In the reaction Zn + CuSO 4 → ZnSO 4 + Cu Zn+CuSO 4 →ZnSO 4 +Cu, what is displaced?
-
a) Zinc displaces copper
-
b) Copper displaces zinc
-
c) Copper displaces zinc sulfate
-
d) Zinc displaces zinc sulfate
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following is true about a decomposition reaction?
-
a) It involves one reactant breaking down into two or more products
-
b) It involves two or more reactants combining
-
c) It results in the formation of a precipitate
- < [Read More]
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
What is produced when calcium carbonate reacts with hydrochloric acid?
-
a) Calcium chloride, water, and carbon dioxide
-
b) Calcium oxide and water
-
c) Calcium chloride and carbon monoxide
-
d) Calcium sulfate and water
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
What is the product of the reaction between sodium and water?
-
a) Sodium hydroxide and hydrogen gas
-
b) Sodium chloride and oxygen gas
-
c) Sodium oxide and hydrogen gas
-
d) Sodium nitrate and oxygen gas
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following reactions is an example of a redox reaction?
-
a) H2+O2→H2O\text{H}_2 + \text{O}_2 \rightarrow \text{H}_2OH2+O2→H2O
-
b) NaOH+HCl→NaCl+H2O\text{NaOH} + \text{HCl} \rightarrow \text{NaCl} + \text{H}_2ONaOH+HCl→NaCl+H2O
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
What is the product when sulfuric acid reacts with sodium hydroxide?
-
a) Sodium sulfate and water
-
b) Sodium chloride and water
-
c) Sodium hydroxide and sulfur dioxide
-
d) Sodium sulfide and water
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following is a physical change?
-
-
a) Burning of wood
-
b) Dissolving sugar in water
-
c) Rusting of iron
-
d) Cooking of food
-
-
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
What is the product of the reaction between sodium carbonate and hydrochloric acid?
-
a) Sodium chloride, water, and carbon dioxide
-
b) Sodium hydroxide and carbon dioxide
-
c) Sodium chloride and oxygen gas
-
d) Sodium sulfate and water
< [Read More]
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following is an example of a displacement reaction?
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following is a product of the reaction between zinc and hydrochloric acid?
-
a) Hydrogen gas and zinc chloride
-
b) Hydrogen gas and zinc sulfate
-
c) Zinc oxide and hydrochloric acid
-
d) Water and zinc chloride
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
What type of reaction is shown by the equation: CaO + H 2 𝑂 → Ca(OH) 2 CaO+H 2 O→Ca(OH) 2 ?
-
a) Combination reaction
-
b) Decomposition reaction
-
c) Displacement reaction
-
d) Double displacement reaction
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following represents an exothermic reaction?
-
a) Ice melting
-
b) Combustion of methane
-
c) Photosynthesis
-
d) Evaporation of water
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
In the reaction 2H 2 + O 2 → 2H 2 𝑂 2H 2 +O 2 →2H 2 O, what type of reaction is it?
-
a) Decomposition reaction
-
b) Combination reaction
-
c) Displacement reaction
-
d) Redox reaction
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
What is the result of a reaction between an alkali and an acid?
-
a) Salt and water
-
b) Salt and carbon dioxide
-
c) Oxygen and water
-
d) Oxygen and salt
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following statements is true for the decomposition of calcium carbonate ( CaCO 3 CaCO 3 )?
-
a) It is a combination reaction
-
b) It is a displacement reaction
-
c) It is a decomposition reaction
-
d) It is a redox reaction
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following reactions is an example of an endothermic reaction?
-
a) Combustion of natural gas
-
b) Dissolving ammonium nitrate in water
-
c) Rusting of iron
-
d) Respiration
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
What is the product when sodium bicarbonate reacts with acetic acid?
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
What is the product when sodium hydroxide reacts with carbon dioxide?
-
a) Sodium carbonate
-
b) Sodium bicarbonate
-
c) Sodium chloride
-
d) Sodium oxide
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following is a characteristic of a displacement reaction?
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
What type of reaction is represented by the following equation: CaCO 3 → CaO + CO 2 CaCO 3 →CaO+CO 2 ?
-
a) Combination reaction
-
b) Decomposition reaction
-
c) Displacement reaction
-
d) Double displacement reaction
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
In the reaction Zn + CuSO 4 → ZnSO 4 + Cu Zn+CuSO 4 →ZnSO 4 +Cu, which element is displaced?
-
a) Copper is displaced by zinc
-
b) Zinc is displaced by copper
-
c) Copper sulfate is displaced
-
d) None of the above
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
What is the product of the reaction between sulfuric acid and copper oxide?
-
a) Copper sulfate and water
-
b) Copper sulfate and oxygen
-
c) Copper oxide and water
-
d) Copper oxide and sulfur dioxide
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following is an example of an endothermic reaction?
-
a) Combustion of hydrogen
-
b) Photosynthesis
-
c) Oxidation of iron
-
d) Burning of wood
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following is true for a neutralization reaction?
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following is a product of the reaction between an acid and a carbonate?
-
a) Salt and water
-
b) Salt and hydrogen gas
-
c) Salt and carbon dioxide
-
d) Water and oxygen gas
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
What happens when an acid reacts with a metal?
-
a) A salt is formed
-
b) Water is formed
-
c) Hydrogen gas is evolved
-
d) Oxygen gas is evolved
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
In the reaction Cu + H 2 SO 4 → CuSO 4 + H 2 Cu+H 2 SO 4 →CuSO 4 +H 2 , what is oxidized?
-
a) Copper
-
b) Sulfuric acid
-
c) Hydrogen
-
d) None of the above
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
What is the primary characteristic of a combination reaction?
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 7 months ago
- In: foundation
Which of the following reactions is an example of a redox reaction?
-
a) 2NaOH+H2SO4→Na2SO4+2H2O\text{2NaOH} + \text{H}_2SO_4 \rightarrow \text{Na}_2SO_4 + \text{2H}_2O2NaOH+H2SO4→Na2SO4+2H2O
-
b) Fe2O3+3CO→2Fe+3CO2\text{Fe}_2O_3 + 3\text{CO} \rightarrow 2\text [Read More]
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following is a mineral acid?
-
A) Lactic acid
-
B) Formic acid
-
C) Tartaric acid
-
D) Hydrochloric acid
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following is an organic acid?
-
A) Citric acid
-
B) Hydrochloric acid
-
C) Lactic acid
-
D) Both A and C
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following is incorrect?
-
A) Acids turn blue litmus paper red
-
B) Aqueous solutions of acids conduct electricity
-
C) Acids react with certain metals to form hydrogen gas
-
D) None of these
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which acid is used in the treatment of bone marrow and scurvy diseases?
-
A) Acetic acid
-
B) Hydrochloric acid
-
C) Ascorbic acid
-
D) Nitric acid
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
What happens when a solution of an acid is mixed with a solution of a base in a test tube?
-
A) Temperature of the solution decreases
-
B) Temperature of the solution increases
-
C) Temperature of the solution remains the same
-
D) Salt formation takes place
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
When hydrogen chloride gas is prepared on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to:
-
A) Absorb the evolved gas
-
B) Moisten the gas
-
C) Absorb moisture from the gas
-
D) Absorb Cl⁻ ions from the evolved gas
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following salts does not contain water of crystallisation?
-
A) Blue vitriol
-
B) Baking soda
-
C) Washing soda
-
D) Gypsum
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
In terms of acidic strength, which one of the following is in the correct increasing order?
-
A) Water < Acetic acid < Hydrochloric acid
-
B) Water < Hydrochloric acid < Acetic acid
-
C) Acetic acid < Water < Hydrochloric acid
-
D) Hydrochlori [Read More]
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
What is formed when zinc reacts with sodium hydroxide?
-
A) Zinc hydroxide and sodium
-
B) Sodium zincate and hydrogen gas
-
C) Sodium zinc-oxide and hydrogen gas
-
D) Sodium zincate and water
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following is a strong acid?
-
A) HCl pH 1
-
B) CH₃COOH pH 5
-
C) Lemon juice pH 2.2
-
D) Pure Milk pH 6
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
pH value less than 7 indicates that the solution is:
-
A) Acidic
-
B) Basic
-
C) Neutral
-
D) No effect
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following is neutral salt?
-
A) NH₄Cl
-
B) CH₃COONH₄
-
C) CH₃COONa
-
D) Na₂CO₃
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Lactic acid is present in:
-
A) Orange
-
B) Tea
-
C) Curd
-
D) Vinegar
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following substance will not give carbon dioxide on treatment with dilute acid?
-
A) Marble
-
B) Limestone
-
C) Baking soda
-
D) Lime
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The reaction between an acid and a base to form a salt and water is called:
-
A) Neutralization
-
B) Endothermic
-
C) Both A and B
-
D) None of these
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
An indicator is what type of compound?
-
A) Reducing agent
-
B) Strong base or acid
-
C) Weak base or acid
-
D) Salt
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
H₂SO₄ can be prepared by reaction of water with:
-
A) NO₂
-
B) SO₂
-
C) N₂O
-
D) SO₃
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The acidity of Fe(OH)₃ is:
-
A) 2
-
B) 3
-
C) 4
-
D) 5
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following is a weak acid?
-
A) Sulphuric acid
-
B) Hydrochloric acid
-
C) Acetic acid
-
D) Nitric acid
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of these bases is not an alkali?
-
A) NaOH
-
B) NH₄OH
-
C) Al(OH)₃
-
D) All of these are alkalis
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which substance is used to purify water?
-
A) Ammonium chloride
-
B) Copper sulphate
-
C) Chlorine
-
D) None of these
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The pH of a solution is 7. How can you increase its pH?
-
A) By adding a small amount of acid
-
B) By adding a small amount of base
-
C) By adding a small amount of salt
-
D) By passing carbon dioxide gas through it
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
When copper oxide and dilute hydrochloric acid react, the colour changes to:
-
A) White
-
B) Bluish-green
-
C) Blue-black
-
D) Black
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following salts is used in the manufacture of glass, soap, and paper?
-
A) Sodium chloride
-
B) Sodium carbonate
-
C) Sodium hydroxide
-
D) Sodium nitrate
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Baking soda is:
-
A) Sodium hydroxide
-
B) Sodium carbonate
-
C) Sodium bicarbonate
-
D) Sodium sulphate
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
What is the common name of calcium hydroxide?
-
A) Quick lime
-
B) Slaked lime
-
C) Lime stone
-
D) Caustic soda
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which gas is evolved when metal reacts with an acid?
-
A) Oxygen
-
B) Carbon dioxide
-
C) Hydrogen
-
D) Nitrogen
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following is not an effect of acid rain?
-
A) Damage to buildings
-
B) Reduced crop productivity
-
C) Increase in soil pH
-
D) Harm to aquatic life
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Tooth decay starts when pH of mouth is:
-
A) Above 7
-
B) Equal to 7
-
C) Below 5.5
-
D) Below 3
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following is used as an antacid?
-
A) NaCl
-
B) Mg(OH)₂
-
C) NaHCO₃
-
D) Both B and C
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
A solution turns red litmus blue. Its pH is likely to be:
-
A) 1
-
B) 4
-
C) 7
-
D) 10
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The chemical formula of gypsum is:
-
A) CaSO₄
-
B) CaCO₃
-
C) CaSO₄·2H₂O
-
D) Ca(OH)₂
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which acid is present in vinegar?
-
A) Formic acid
-
B) Acetic acid
-
C) Citric acid
-
D) Oxalic acid
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The pH of distilled water is
-
A) 5
-
B) 6
-
C) 7
-
D) 8
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Neutralisation reaction is:
-
A) Exothermic
-
B) Endothermic
-
C) Reversible
-
D) None of these
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Common salt is obtained from seawater by:
-
A) Filtration
-
B) Evaporation
-
C) Crystallisation
-
D) Sedimentation
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which one is an example of a basic salt?
-
A) NaCl
-
B) NH₄Cl
-
C) CH₃COONa
-
D) Na₂CO₃
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The salt used to remove permanent hardness of water is:
-
A) Baking soda
-
B) Washing soda
-
C) Caustic soda
-
D) Common salt
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Sodium carbonate is a basic salt because it is a salt of:
-
A) Strong acid and strong base
-
B) Weak acid and strong base
-
C) Strong acid and weak base
-
D) Weak acid and weak base
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following is a strong acid?
-
A) Hydrochloric acid (HCl)
-
B) Acetic acid (CH₃COOH)
-
C) Citric acid
-
D) Lactic acid
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
What is the pH of a neutral solution?
-
A) 0
-
B) 7
-
C) 14
-
D) 1
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following is a natural indicator?
-
A) Methyl orange
-
B) Phenolphthalein
-
C) Litmus
-
D) Universal indicator
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The pH of a solution is 9. What type of solution is it?
-
A) Acidic
-
B) Basic
-
C) Neutral
-
D) Alkaline
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following is a weak base?
-
A) Sodium hydroxide (NaOH)
-
B) Potassium hydroxide (KOH)
-
C) Ammonia (NH₃)
-
D) Calcium hydroxide (Ca(OH)₂)
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The salt used to make the water in swimming pools basic is:
-
A) Sodium chloride
-
B) Calcium carbonate
-
C) Magnesium sulfate
-
D) Potassium nitrate
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which acid is present in tamarind?
-
A) Tartaric acid
-
B) Oxalic acid
-
C) Lactic acid
-
D) Citric acid
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The pH of lemon juice is:
-
A) 2.2
-
B) 4.5
-
C) 6.0
-
D) 7.0
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following substances is not acidic?
-
A) Lemon juice
-
B) Vinegar
-
C) Milk of magnesia
-
D) Orange juice
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The reaction between an acid and a base is known as:
-
A) Neutralization
-
B) Precipitation
-
C) Combustion
-
D) Oxidation
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following is a non-metal?
-
a) Sodium
-
b) Chlorine
-
c) Aluminium
-
d) Copper
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which metal is the least reactive?
-
a) Sodium
-
b) Zinc
-
c) Copper
-
d) Gold
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following is a physical property of metals?
-
a) Brittle
-
b) Poor conductors of heat and electricity
-
c) Malleable
-
d) Non-lustrous
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following is a chemical property of metals?
-
a) High electronegativity
-
b) Ability to form negative ions
-
c) Reactivity with water
-
d) Brittle nature
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following is not a property of non-metals?
-
a) Good conductors of heat and electricity
-
b) Brittle
-
c) Non-lustrous
-
d) Poor conductors of heat and electricity
-
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following non-metals is a good conductor of electricity?
-
a) Oxygen
-
b) Carbon
-
c) Graphite
-
d) Nitrogen
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following non-metals is a gas at room temperature?
-
a) Sulphur
-
b) Bromine
-
c) Iodine
-
d) Carbon
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following metals is the most reactive?
-
a) Sodium
-
b) Potassium
-
c) Iron
-
d) Silver
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following non-metals is used in the manufacture of fertilizers?
-
a) Oxygen
-
b) Nitrogen
-
c) Chlorine
-
d) Fluorine
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
which-of-the-following-is-an-iron-ore
-
a) Cinnabar
-
b) Calamine
-
c) Haematite
-
d) Rock salt
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The atomic number of an element Y is 17. The number of electrons in its ion Y⁻ will be:
-
a) 17
-
b) 18
-
c) 19
-
d) 20
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The atomic number of an element X is 19. The number of electrons in its ion X⁺ will be:
-
a) 18
-
b) 19
-
c) 20
-
d) 21
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The atomic numbers of four elements A, B, C, and D are 6, 8, 10, and 12 respectively. The two elements which can react to form ionic bonds are:
-
a) A and D
-
b) B and C
-
c) A and C
-
d) B and D
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
An element X is soft and can be cut with the help of a knife. It is very reactive to air and cannot be kept open in the air. It reacts vigorously with water. Identify the element:
-
a) Mg
-
b) Na
-
c) P
-
d) Ca
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The reaction between X and Y forms compound Z. X loses electrons and Y gains electrons. Which of the following properties is not shown by Z?
-
a) Has a high melting point
-
b) Has a low melting point
-
c) Conducts electricity in a molten state
-
d) Occurs as solid
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following alloys contains a non-metal as one of its constituents?
-
a) Steel
-
b) Brass
-
c) Amalgam
-
d) Bronze
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Galvanisation is a method of protecting steel and iron from rusting by coating them with a thin layer of:
-
a) Copper
-
b) Aluminium
-
c) Zinc
-
d) Bauxite
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following is a non-metallic oxide?
-
a) Na₂O
-
b) MgO
-
c) CO₂
-
d) Fe₂O₃
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
which-of-the-following-metals-is-used-for-making-coins
-
a) Iron
-
b) Gold
-
c) Aluminium
-
d) Zinc
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following metals is used for making aircraft bodies due to its low density?
-
a) Silver
-
b) Iron
-
c) Aluminium
-
d) Copper
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following metals is used for making electrical wires?
-
a) Copper
-
b) Aluminium
-
c) Zinc
-
d) Iron
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following metals is used for making coins and ornaments?
-
a) Iron
-
b) Gold
-
c) Aluminium
-
d) Zinc
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following is a method used for extraction of metals from their ores?
-
a) Electrolysis
-
b) Galvanisation
-
c) Sublimation
-
d) Filtration
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Corrosion of iron is called:
-
a) Rusting
-
b) Tarnishing
-
c) Galvanisation
-
d) Oxidation
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following is not an alloy?
-
a) Brass
-
b) Bronze
-
c) Steel
-
d) Carbon
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following metal is obtained by electrolytic reduction of its molten ore?
-
a) Iron
-
b) Aluminium
-
c) Copper
-
d) Zinc
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which gas is produced when a metal reacts with acid?
-
a) Oxygen
-
b) Carbon dioxide
-
c) Hydrogen
-
d) Nitrogen
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which metal does not react with cold or hot water but reacts with steam?
-
a) Sodium
-
b) Potassium
-
c) Magnesium
-
d) Iron
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
A metal M reacts with oxygen to form a basic oxide. M is most likely to be:
-
a) Carbon
-
b) Sulphur
-
c) Magnesium
-
d) Phosphorus
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following is used to prevent rusting of iron?
-
a) Electroplating
-
b) Alloying
-
c) Painting
-
d) All of the above
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which metal is used to galvanise iron?
-
a) Zinc
-
b) Copper
-
c) Lead
-
d) Tin
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Bronze is an alloy of:
-
a) Copper and Zinc
-
b) Copper and Tin
-
c) Copper and Silver
-
d) Copper and Lead
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which non-metal is essential for combustion?
-
a) Hydrogen
-
b) Nitrogen
-
c) Carbon
-
d) Oxygen
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
which-of-the-following-non-metals-is-used-in-the-purification-of-water
-
a) Oxygen
-
b) Chlorine
-
c) Nitrogen
-
d) Sulphur
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which metal is used in thermometers?
-
a) Lead
-
b) Iron
-
c) Mercury
-
d) Copper
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which property is common to most metals?
-
a) Low melting point
-
b) Poor conductivity
-
c) Lustrous appearance
-
d) Low density
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
What is the valency of magnesium?
-
a) 1
-
b) 2
-
c) 3
-
d) 4
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which among the following is used to extract metals that are high in reactivity?
a) Heating with carbon
b) Roasting
c) Electrolysis
d) Reduction
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of these metals can displace hydrogen from acids?
-
a) Gold
-
b) Copper
-
c) Silver
-
d) Zinc
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
What type of oxide is formed by non-metals?
-
a) Basic
-
b) Acidic
-
c) Neutral
-
d) Both b and c
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following does not conduct electricity in solid state but conducts in molten state?
-
a) Ionic compounds
-
b) Covalent compounds
-
c) Metals
-
d) Non-metals
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following is not a physical property of metals?
-
a) Ductility
-
b) Malleability
-
c) Sonorousness
-
d) Brittleness
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following non-metals exists in the liquid state at room temperature?
-
a) Chlorine
-
b) Iodine
-
c) Bromine
-
d) Fluorine
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which metal is stored in kerosene to prevent its reaction with air?
-
a) Zinc
-
b) Aluminium
-
c) Sodium
-
d) Copper
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which process is used to convert a metal oxide into a metal using carbon?
-
a) Roasting
-
b) Calcination
-
c) Reduction
-
d) Electrolysis
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
What is formed when sulphur dioxide dissolves in water?
-
What is formed when sulphur dioxide dissolves in water?What is formed when sulphur dioxide dissolves in water?
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
What happens when iron nails are placed in copper sulphate solution?What happens when iron nails are placed in copper sulphate solution?
-
a) Iron dissolves
-
b) Copper is deposited on iron
-
c) Solution turns green
-
d) No reaction
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
which-of-these-is-not-formed-by-a-reaction-of-a-metal-with-water
-
a) Metal hydroxide
-
b) Hydrogen gas
-
c) Salt
-
d) None of the above
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which metal is most commonly used in making utensils?
-
a) Silver
-
b) Aluminium
-
c) Lead
-
d) Zinc
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
What is the chemical formula of rust?
-
a) Fe₂O₃
-
b) Fe₃O₄
-
c) Fe₂O₃·xH₂O
-
d) FeO
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following does not show displacement reaction?
-
a) Zn + CuSO₄ → ?
-
b) Fe + CuSO₄ → ?
-
c) Cu + ZnSO₄ → ?
-
d) Mg + HCl → ?
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following statements is correct about ionic compounds?
-
a) They have low melting points
-
b) They conduct electricity in solid state
-
c) They are generally soluble in water
-
d) They form molecules with shared electrons
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Carbon has a valency of:
a) 1
b) 2
c) 4
d) 6
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Covalent compounds are:
a) Good conductors
b) Soluble in water
c) Formed by transfer of electrons
d) Formed by sharing of electrons
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
which-of-the-following-is-a-saturated-hydrocarbon
a) Ethene
b) Ethyne
c) Ethane
d) Benzene
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
a-covalent-bond-is-formed-by
a) Transfer of electrons
b) Sharing of electrons
c) Loss of electrons
d) Gain of electrons
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The total number of covalent bonds in methane (CH₄) is:
a) 2
b) 3
c) 4
d) 5
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which element forms the largest number of compounds?
a) Oxygen
b) Carbon
c) Hydrogen
d) Nitrogen
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
A compound with molecular formula C₂H₆ is:
a) Ethene
b) Ethyne
c) Ethanol
d) Ethane
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
ich of the following is not a property of carbon compounds?Wh
a) Low boiling point
b) High melting point
c) Poor conductor of electricity
d) Combustible
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The tetravalency of carbon means it can form:
a) 2 bonds
b) 3 bonds
c) 4 bonds
d) 1 bond
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following is a hydrocarbon?
a) HCl
b) CO₂
c) CH₄
d) H₂O
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The general formula of alkanes is:
a) CnH₂n
b) CnH₂n+2
c) CnH₂n−2
d) CnH₂nO
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The IUPAC name of CH₃CH₂OH is:
a) Methanol
b) Ethanol
c) Propanol
d) Butanol
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The compound CH₃COOH is known as:
a) Ethanol
b) Ethanoic acid
c) Methanoic acid
d) Acetone
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Compounds with same molecular formula but different structures are called:
a) Isomers
b) Homologs
c) Esters
d) Alkenes
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Functional group of alcohol is:
a) –COOH
b) –CHO
c) –OH
d) –CO
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following has a carboxylic acid group?
a) CH₄
b) C₂H₆
c) CH₃COOH
d) C₂H₅OH
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
ch3-chch2-is-an
a) Alkane
b) Alkene
c) Alkyne
d) Alcohol
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Propane contains:
a) 2 carbon atoms
b) 3 carbon atoms
c) 4 carbon atoms
d) 5 carbon atoms
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Butyne is an example of:
a) Alkane
b) Alkene
c) Alkyne
d) Alcohol
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which compound is used in alcoholic beverages?
a) Methanol
b) Ethanol
c) Butanol
d) Propanol
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Combustion of hydrocarbons produces:
a) CO₂ and H₂O
b) CO and NO₂
c) CO₂ and SO₂
d) H₂ and O₂
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Ethanol reacts with sodium to form:
a) Sodium hydroxide
b) Hydrogen gas
c) Acetic acid
d) Water
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Ethanoic acid reacts with ethanol in the presence of conc. H₂SO₄ to form:
-
a) Alcohol
b) Aldehyde
c) Ester
d) Ketone -
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following is used as a fuel?
a) Acetic acid
b) Ethanol
c) Methanoic acid
d) Ethanal
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Soap does not form lather in:
a) Cold water
b) Soft water
c) Distilled water
d) Hard water
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Functional group in acetic acid is:
a) –OH
b) –CHO
c) –COOH
d) –CO
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Hydrogenation of alkenes is done using:
a) Ni catalyst
b) Fe catalyst
c) Zn catalyst
d) Cu catalyst
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The process of converting ethanol to ethene is:
a) Addition
b) Substitution
c) Dehydration
d) Oxidation
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Oxidation of ethanol gives:
a) Ethanoic acid
b) Propanoic acid
c) Butanoic acid
d) Methanoic acid
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which gas is evolved when sodium reacts with ethanol?
a) CO₂
b) H₂
c) CH₄
d) O₂
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Methane burns in air to form:
a) CO only
b) CO₂ and water
c) CO₂ only
d) Carbon only
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Ethanol is used in hand sanitizers because it is:
a) Sweet-smelling
b) Non-volatile
c) Antiseptic
d) Sticky
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The reaction of a carboxylic acid with an alcohol in the presence of acid is called:
a) Saponification
b) Esterification
c) Dehydration
d) Hydrolysis
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which compound turns blue litmus red?
a) Soap
b) Sodium hydroxide
c) Acetic acid
d) Alcohol
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The cleansing action of soap is due to:
a) Acidic nature
b) Basic nature
c) Micelle formation
d) Oxidation
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Hard water contains:
a) Na⁺ and K⁺
b) Ca²⁺ and Mg²⁺
c) Cl⁻ and SO₄²⁻
d) Fe³⁺ and Zn²⁺
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The name of CH₃–CH₂–COOH is:
a) Ethanoic acid
b) Propanoic acid
c) Butanoic acid
d) Methanoic acid
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The IUPAC name of CH₃–CHO is:
-
a) Ethanal
b) Ethanoic acid
c) Ethanol
d) Acetone -
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
C₂H₂ belongs to:
-
a) Alkane
b) Alkene
c) Alkyne
d) Alcohol -
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Soaps are sodium or potassium salts of:
a) Aldehydes
b) Alcohols
c) Carboxylic acids
d) Esters
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which type of bonding is present in carbon compounds?
a) Ionic
b) Metallic
c) Covalent
d) Coordinate
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which allotrope of carbon is used as a lubricant?
a) Diamond
b) Graphite
c) Fullerene
d) Charcoal
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The melting point of ethanol is approximately:
a) –114°C
b) 0°C
c) 78°C
d) 100°C
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of these will not decolorize bromine water?
a) Ethene
b) Ethyne
c) Ethane
d) Propene
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following compounds shows isomerism?
a) CH₄
b) C₂H₆
c) C₃H₈
d) C₄H₁₀
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
A carbon compound burns with a yellow sooty flame. It is likely:
a) Saturated hydrocarbon
b) Unsaturated hydrocarbon
c) Alcohol
d) Acid
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of these is not a hydrocarbon?
a) C₂H₆
b) CH₄
c) C₂H₅OH
d) C₃H₈
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The compound used to test the presence of alcohol is:
a) Sodium bicarbonate
b) Potassium dichromate
c) Bromine water
d) Calcium carbonate
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Acetic acid has a sour taste and turns:
a) Blue litmus to red
b) Red litmus to blue
c) Methyl orange to red
d) Both a and c
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Soaps are ineffective in:
a) Tap water
b) Distilled water
c) Hard water
d) Rainwater
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which compound can undergo addition reaction?
a) Ethane
b) Propane
c) Butene
d) Methane
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Micelle formation takes place when soap is added to:
a) Alcohol
b) Oil
c) Acid
d) Glycerin
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Vinegar is a common name for:
a) Ethanol
b) Acetone
c) Acetic acid
d) Methanoic acid
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Unsaturated hydrocarbons undergo:
a) Substitution reactions
b) Addition reactions
c) Neutralization
d) Oxidation only
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The reaction of an acid with an alcohol produces:
a) Soap
b) Aldehyde
c) Ester
d) Ketone
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
C₆H₆ is the molecular formula of:
a) Cyclohexane
b) Benzene
c) Toluene
d) Hexene
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Carbon forms a vast number of compounds due to:
a) High atomic mass
b) Catenation and tetravalency
c) Weak bonds
d) Metallic character
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The oxidizing agent used in the oxidation of ethanol to ethanoic acid is:
a) NaOH
b) HCl
c) Alkaline KMnO₄
d) H₂SO₄
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of these can form multiple bonds (double/triple) with carbon?
a) Hydrogen
b) Chlorine
c) Oxygen
d) Sodium
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The formula for butanoic acid is:
a) C₄H₈O
b) C₄H₁₀O
c) C₄H₈O₂
d) C₃H₆O₂
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following is NOT a life process?
-
a) Nutrition
-
b) Respiration
-
c) Communication
-
d) Excretion
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The process by which green plants make their own food is called:
-
a) Respiration
-
b) Photosynthesis
-
c) Transpiration
-
d) None of the above
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following is NOT a raw material required for photosynthesis?
-
a) Carbon dioxide
-
b) Water
-
c) Oxygen
-
d) Sunlight
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The process by which cells obtain energy from glucose is called:
-
a) Respiration
-
b) Digestion
-
c) Absorption
-
d) Circulation
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following organs is responsible for removing waste products from the body?
-
a) Liver
-
b) Kidney
-
c) Heart
-
d) Lungs
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following is the correct equation for aerobic respiration?
-
a) Glucose + Oxygen → Carbon dioxide + Water + Energy
-
b) Carbon dioxide + Water + Energy → Glucose + Oxygen
-
c) Glucose + Carbon dioxide → Water + Oxygen + Energy
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The autotrophic mode of nutrition requires:
-
a) Carbon dioxide and water
-
b) Chlorophyll
-
c) Sunlight
-
d) All of the above
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The largest gland in the human body is:
-
a) Liver
-
b) Gastric glands
-
c) Pancreas
-
d) Salivary glands
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Number of salivary glands found in humans are:
-
a) One pair
-
b) Two pairs
-
c) Three pairs
-
d) Five pairs
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Pancreatic juice helps in the digestion of:
-
a) Proteins
-
b) Proteins and fats
-
c) Proteins and carbohydrates
-
d) Proteins, carbohydrates, and fats
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
ATP and NADP₂H are produced in:
-
a) Mitochondria
-
b) Chloroplast
-
c) Peroxisomes
-
d) Lysosomes
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Oxygen evolved during photosynthesis comes from:
-
a) Water
-
b) CO₂
-
c) Soil
-
d) Atmosphere
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Rate of photosynthesis is high in:
-
a) Orange light
-
b) Green light
-
c) Red light
-
d) Yellow light
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The ultimate source of all metabolic energy on our earth is:
-
a) Green plants
-
b) The sun
-
c) O₂
-
d) O₂ and H₂O
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Light reaction takes place in:
-
a) Grana
-
b) Stroma
-
c) Mitochondria
-
d) Leucoplast
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Plants purify air by:
-
a) Transpiration
-
b) Photosynthesis
-
c) Respiration
-
d) Absorption of water
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
In amoeba, food is digested in the:
-
a) Food vacuole
-
b) Mitochondria
-
c) Pseudopodia
-
d) Chloroplast
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The contraction and expansion movement of the walls of the food pipe is called:
-
a) Translocation
-
b) Transpiration
-
c) Peristaltic movement
-
d) Digestion
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
When a few drops of iodine solution are added to rice water, the solution turns blue-black in colour. This indicates that rice water contains:
-
a) Fats
-
b) Complex proteins
-
c) Starch
-
d) Simple proteins
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following is the correct sequence of body parts in the human alimentary canal?
-
a) Mouth → Stomach → Small intestine → Large intestine → Oesophagus
-
b) Mouth → Oesophagus → Stomach → Small intestine → Large intestine
-
c) Mouth [Read More]
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following is NOT a component of the human circulatory system?
-
a) Heart
-
b) Blood vessels
-
c) Lungs
-
d) Blood
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The main function of the circulatory system is to:
-
a) Transport nutrients
-
b) Transport oxygen
-
c) Transport hormones
-
d) All of the above
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 5 months ago
- In: foundation
Which of the following is NOT a component of blood?
-
a) Plasma
-
b) Red blood cells
-
c) White blood cells
-
d) Lymph
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The process by which plants lose water through their leaves is called:
-
a) Transpiration
-
b) Evaporation
-
c) Respiration
-
d) Photosynthesis
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The primary function of the stomata is to:
-
a) Absorb water
-
b) Transport food
-
c) Exchange gases
-
d) Provide support to the leaf
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The process of filtration in the kidneys takes place in:
-
a) Neurons
-
b) Nephrons
-
c) Glomerulus
-
d) Alveoli
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which part of the nephron is responsible for the filtration of blood?
-
a) Bowman's capsule
-
b) Tubule
-
c) Collecting duct
-
d) Loop of Henle
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which of the following organisms does NOT have a circulatory system?
-
a) Earthworm
-
b) Amoeba
-
c) Fish
-
d) Frog
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which blood vessels carry blood away from the heart?
-
a) Veins
-
b) Arteries
-
c) Capillaries
-
d) Venules
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Blood from the heart is transported to the lungs by:
-
a) Pulmonary artery
-
b) Pulmonary vein
-
c) Aorta
-
d) Vena cava
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Which chamber of the human heart receives oxygenated blood from the lungs?
-
a) Right atrium
-
b) Right ventricle
-
c) Left atrium
-
d) Left ventricle
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
The xylem in plants is responsible for:
-
a) Transport of food
-
b) Transport of water
-
c) Transport of hormones
-
d) None of the above
Ajay
300 Points- Mahak goyal (30450) Points
- Latest Answer: 6 months ago
- In: foundation
Translocation in plants occurs through:
-
a) Xylem
-
b) Phloem
-
c) Stomata
-
d) Cuticle
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What is the chemical equation for the reaction of magnesium with oxygen?
a) Mg + O → MgO b) 2Mg + O₂ → 2MgO c) Mg + O₂ → Mg₂O d) Mg + O → Mg₂O
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which of the following is a decomposition reaction?
a) 2H₂ + O₂ → 2H₂O b) CaCO₃ → CaO + CO₂ c) Zn + HCl → ZnCl₂ + H₂ d) AgNO₃ + NaCl → AgCl + NaNO₃
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Rusting of iron is an example of:
a) Displacement b) Combination c) Redox d) Precipitation
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which gas is evolved when zinc reacts with dilute HCl?
a) Oxygen b) Hydrogen c) Nitrogen d) Carbon dioxide
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Copper turns green in moist air due to formation of:
a) Copper oxide b) Copper sulphide c) Basic copper carbonate d) Copper hydroxide
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which of the following is a displacement reaction?
a) NaOH + HCl → NaCl + H₂O b) Zn + CuSO₄ → ZnSO₄ + Cu c) AgNO₃ + NaCl → AgCl + NaNO₃ d) CaCO₃ → CaO + CO₂
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What is the balanced equation for the formation of water?
a) H₂ + O → H₂O b) 2H₂ + O₂ → 2H₂O c) H₂ + O₂ → H₂O₂ d) 2H + O → H₂O
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which of the following is not a characteristic of a chemical reaction?
a) Change in state b) Change in color c) Evolution of gas d) Temporary change
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What is used to balance chemical equations?
a) Physical state symbols b) Chemical formulas c) Coefficients d) Arrows
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
In redox reactions, oxidation involves:
a) Gain of electrons b) Loss of electrons c) Gain of protons d) Loss of neutrons
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
2KClO₃ → 2KCl + 3O₂ is a:
a) Combination b) Decomposition c) Displacement d) Neutralization
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Digestion in our body is an example of:
a) Combination b) Displacement c) Decomposition d) Redox
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which of the following indicates a chemical reaction?
a) Change in shape b) Change in temperature c) Change in size d) Movement
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
The chemical formula of quicklime is:
a) CaCO₃ b) Ca(OH)₂ c) CaO d) CaCl₂
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What happens when iron is placed in copper sulphate solution?
a) Blue remains b) Blue fades + brown deposit c) Green appears d) No change
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Reaction used in black and white photography:
a) Decomposition of AgBr b) Ag + Br c) Displacement d) Formation of AgCl
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What is true for a displacement reaction?
a) Reactive replaces less reactive b) Only gases form c) Only acids react d) No metal displacement
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Coating of iron with zinc is called:
a) Electroplating b) Rusting c) Galvanization d) Anodizing
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
A redox reaction includes:
a) Only oxidation b) Only reduction c) Both oxidation & reduction d) Neither
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Strong Acid Example
a) HCl pH 1
b) CH₃COOH pH 5
c) Lemon juice pH 2.2
d) Pure Milk pH 6
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Na₂CO₃·10H₂O Compound
a) Baking soda
b) Baking powder
c) Washing soda
d) Bleaching powder
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
pH Value Indicator
a) Acidic
b) Basic
c) Neutral
d) No effect
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Neutral Salt Identification
a) NH₄Cl
b) CH₃COONH₄
c) CH₃COONa
d) Na₂CO₃
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Lactic Acid Source
a) Orange
b) Tea
c) Curd
d) Vinegar
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Soil Acidity Neutralization
a) Slaked lime
b) Gypsum
c) Caustic soda
d) Baking soda
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Components in HCl Solution
a) H₃O⁺ Cl⁻
b) H₃O⁺ OH⁻
c) Cl⁻ OH⁻
d) Unionised HCl
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Salt Without Water of Crystallisation
a) Blue vitriol
b) Baking soda
c) Washing soda
d) Gypsum
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Reversing Litmus Color Change
a) Baking powder
b) Lime
c) Ammonium hydroxide solution
d) Hydrochloric acid
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Human Body pH Range
a) 5.5 to 8.5
b) 7.0 to 7.8
c) 2.3 to 7.0
d) 7.5 to 12.5
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Plaster of Paris Formula
a) CaSO₄·2H₂O
b) CaSO₄·3H₂O
c) CaSO₄·½H₂O
d) CaCO₃·½H₂O
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Acid-Base Reaction Outcome
a) Salt
b) Water
c) Gas
d) All of the above
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Acidic Salt Identification
a) NH₄Cl
b) CH₃COONH₄
c) NaCl
d) Na₂CO₃
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Hydrogen Detection in Reactions
a) By water
b) By litmus paper
c) By methyl orange
d) By a burning candle
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Alkaline Solutions Identification
a) A and B
b) B and C
c) C and D
d) A and D
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Gypsum Heating Temperature
) 35°C
b) 70°C
c) 80°C
d) 100°C
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Sodium Carbonate Reaction
a) CO₂ is evolved
b) NaOH is formed
c) NaCl is formed
d) Only heat is evolved
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Primary Ore of Aluminium
a) Kaolinite
b) Bauxite
c) Malachite
d) Cinnabar
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Least Reactive Metal
a) Sodium
b) Magnesium
c) Iron
d) Gold
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Metal Used in Electrical Wiring
a) Iron
b) Copper
c) Aluminium
d) Zinc
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Non-Metal Used in Food Preservation
a) Carbon
b) Phosphorus
c) Sulphur
d) Nitrogen
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Alloy of Copper and Zinc
a) Brass
b) Bronze
c) Duralumin
d) Steel
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Metal Used in Aircraft Bodies
a) Silver
b) Iron
c) Aluminium
d) Copper
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Non-Metal Essential for Combustion
a) Hydrogen
b) Oxygen
c) Helium
d) Nitrogen
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Metal Extracted from Bauxite
a) Iron
b) Aluminium
c) Mercury
d) Copper
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Process of Heating Sulphide Ore
a) Roasting
b) Smelting
c) Calcination
d) Refining
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Metal That Is Liquid at Room Temperature
a) Bromine
b) Mercury
c) Iodine
d) Potassium
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Non-Metal That Is Liquid at Room Temperature
a) Chlorine
b) Bromine
c) Iodine
d) Nitrogen
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Metal Used in Making Jewellery
a) Silver
b) Gold
c) Copper
d) Platinum
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Non-Metal Used in Fertilizers
a) Nitrogen
b) Phosphorus
c) Potassium
d) Sulphur
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Metal Extracted from Hematite
a) Iron
b) Aluminium
c) Copper
d) Zinc
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Process of Heating Carbonate Ore
a) Roasting
b) Smelting
c) Calcination
d) Refining
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Metal Used in Making Coins
a) Brass
b) Bronze
c) Copper-Nickel Alloy
d) Aluminium
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Non-Metal Used in Making Matches
a) Sulphur
b) Phosphorus
c) Nitrogen
d) Oxygen
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Metal That Reacts with Water
a) Sodium
b) Magnesium
c) Calcium
d) Iron
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Metal That Does Not React with Water
a) Gold
b) Silver
c) Copper
d) Zinc
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which is the site of photosynthesis in a plant cell?
A. Mitochondria, B. Chloroplast, C. Cytoplasm, D. Nucleus
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which of the following is a heterotrophic organism?
A. Mango, B. Mushroom, C. Algae, D. Fern
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which gas is released during photosynthesis?
A. CO₂, B. O₂, C. H₂O, D. N₂
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Where is bile produced in the human body?
A. Stomach, B. Liver, C. Gall bladder, D. Pancreas
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What is the function of bile juice?
A. Digests protein, B. Emulsifies fat, C. Digests starch, D. Absorbs food
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which organelle is known as the powerhouse of the cell?
A. Lungs, B. Muscles during exercise, C. Kidneys, D. Heart
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which structure prevents food from entering the windpipe?
A. Diaphragm, B. Trachea, C. Epiglottis, D. Larynx
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Exchange of gases in humans takes place in:
A. Bronchi, B. Alveoli, C. Trachea, D. Pharynx
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which part of the plant is responsible for transporting water?
A. Phloem, B. Xylem, C. Cortex, D. Cambium
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which component of blood transports oxygen?
A. RBC, B. WBC, C. Platelets, D. Plasma
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
How many chambers are present in a human heart?
A. 2, B. 3, C. 4, D. 5
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which blood vessel carries oxygenated blood from lungs to heart?
A. Pulmonary artery, B. Pulmonary vein, C. Aorta, D. Vena cava
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Main excretory organ in humans is:
A. Lungs, B. Liver, C. Kidney, D. Skin
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Urine is carried from kidneys to urinary bladder by:
A. Urethra, B. Ureters, C. Nephrons, D. Tubules
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Plants get rid of excess water through:
A. Roots, B. Leaves, C. Stomata, D. Bark
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
In amoeba, food is digested in:
A. Nucleus, B. Food vacuole, C. Cytoplasm, D. Mouth
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
The green pigment involved in photosynthesis is:
A. Chlorophyll, B. Hemoglobin, C. Keratin, D. Melanin
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which part of the heart pumps oxygenated blood to the body?
A. Right atrium, B. Right ventricle, C. Left atrium, D. Left ventricle
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What is the role of diaphragm in respiration?
A. Pumps blood, B. Filters air, C. Controls heartbeat, D. Helps in breathing
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which enzyme is present in saliva and helps in digestion of starch?
A. Pepsin, B. Amylase, C. Lipase, D. Trypsin
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What is the structural and functional unit of the nervous system?
A) Axon B) Brain C) Neuron D) Synapse
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which part of the brain maintains posture and balance?
A) Cerebrum B) Cerebellum C) Medulla D) Thalamus
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which hormone regulates the sugar level in blood?
A) Thyroxine B) Adrenaline C) Insulin D) Estrogen
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Reflex actions are controlled by which part of the nervous system?
A) Brain B) Spinal cord C) Cerebrum D) Cerebellum
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Reflex actions are controlled by which part of the nervous system?
A) Brain B) Spinal cord C) Cerebrum D) Cerebellum
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
The gap between two neurons is called?
A) Dendrite B) Synapse C) Axon D) Cell body
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which plant hormone promotes cell enlargement and growth?
A) Auxin B) Gibberellin C) Cytokinin D) Ethylene
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which is a tropic movement?
A) Folding of leaves B) Growth of shoot towards light C) Opening of flower D) Dropping of leaves
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which gland is called the "master gland"?
A) Thyroid B) Adrenal C) Pituitary D) Pancreas
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which hormone prepares the body for fight or flight?
A) Insulin B) Thyroxine C) Estrogen D) Adrenaline
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Involuntary actions like heartbeat are controlled by?
A) Cerebrum B) Medulla oblongata C) Spinal cord D) Cerebellum
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which part of the brain is responsible for thinking?
A) Cerebellum B) Medulla C) Cerebrum D) Pons
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
The movement of sunflower facing the sun is called?
A) Hydrotropism B) Thigmotropism C) Phototropism D) Geotropism
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Movement of roots towards water is known as?
A) Geotropism B) Hydrotropism C) Phototropism D) Chemotropism
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which part of the brain controls voluntary actions?
A. Cerebellum B. Cerebrum C. Medulla D. Pons
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which hormone regulates the sugar level in blood?
A. Adrenaline B. Thyroxine C. Insulin D. Estrogen
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Reflex actions are controlled by which part of the nervous system?
A. Brain B. Spinal cord C. Cerebrum D. Medulla
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Reflex actions are controlled by which part of the nervous system?
A. Brain B. Spinal cord C. Cerebrum D. Medulla
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Iodine is necessary for the synthesis of which hormone?
A. Adrenaline B. Testosterone C. Thyroxine D. Estrogen
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which gland is called the master gland?
A. Thyroid B. Pituitary C. Adrenal D. Pancreas
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which part of the brain maintains posture and balance?
A. Cerebrum B. Cerebellum C. Medulla D. Thalamus
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
The message is carried from one neuron to another by:
A. Dendrites B. Axons C. Neurotransmitters D. Synapse
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
The growth of pollen tube towards ovule is an example of:
A. Geotropism B. Phototropism C. Chemotropism D. Hydrotropism
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Tropic movements in plants are:
A. Non-directional B. Directional C. Voluntary D. Involuntary
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which hormone helps in cell division in plants?
Auxin B. Cytokinin C. Ethylene D. ABA
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which part of the neuron receives messages?
A. Axon B. Dendrite C. Synapse D. Soma
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which plant hormone promotes fruit ripening?
A. Auxin B. Gibberellin C. Ethylene D. ABA
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What is the function of the medulla in the brain?
A. Learning B. Posture C. Digestion D. Breathing
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which of these is not a function of hormones?
A. Growth regulation B. Reflex action C. Metabolism D. Reproduction
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which part connects the brain and spinal cord?
A. Cerebrum B. Pons C. Medulla D. Thalamus
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which hormone is responsible for the fight or flight response?
A. Insulin B. Estrogen C. Adrenaline D. Thyroxine
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which of these is an example of a reflex action?
A. Solving a puzzle B. Reading a book C. Pulling hand from hot object D. Walking
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
. Movement of sunflower towards sunlight is:
A. Hydrotropism B. Chemotropism C. Geotropism D. Phototropism
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Gibberellins are responsible for:
A. Fruit ripening B. Seed dormancy C. Stem elongation D. Leaf fall
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which part of the brain controls voluntary actions?
A. Cerebellum B. Cerebrum C. Medulla D. Hypothalamus
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What is the functional unit of the nervous system?
A. Axon B. Neuron C. Brain D. Spinal Cord
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which hormone regulates the sugar level in blood?
A. Thyroxine B. Adrenaline C. Insulin D. Growth Hormone
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which part of the brain maintains posture and balance?
A. Cerebrum B. Cerebellum C. Medulla D. Spinal Cord
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which hormone is secreted by the thyroid gland?
A. Insulin B. Adrenaline C. Thyroxine D. Estrogen
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Reflex actions are controlled by which part of the body?
A. Brain B. Cerebrum C. Spinal Cord D. Cerebellum
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What is the gap between two neurons called?
A. Axon B. Dendrite C. Synapse D. Nucleus
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which hormone is known as the 'fight or flight' hormone?
A. Estrogen B. Adrenaline C. Insulin D. Testosterone
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which of the following is a plant hormone?
A. Insulin B. Thyroxine C. Auxin D. Testosterone
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Tropism is a response to which type of stimulus?
A. Voluntary B. Involuntary C. External D. Internal
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which part of the neuron carries impulses away from the cell body?
A. Dendrite B. Axon C. Synapse D. Nucleus
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which hormone helps in regulating metabolism?
A. Insulin B. Thyroxine C. Estrogen D. Testosterone
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Movement of a plant in response to light is called?
A. Geotropism B. Phototropism C. Hydrotropism D. Thigmotropism
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
The medulla in the brain controls?
A. Balance B. Emotions C. Reflexes D. Heartbeat and Breathing
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which system controls and coordinates body activities?
A. Circulatory B. Respiratory C. Nervous and Endocrine D. Digestive
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which hormone is released by adrenal glands?
A. Estrogen B. Adrenaline C. Insulin D. Thyroxine
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which of these is NOT an involuntary action?
A. Beating of heart B. Walking C. Breathing D. Peristalsis
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What connects the brain and spinal cord?
A. Medulla B. Pons C. Cerebrum D. Hypothalamus
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Geotropism is movement in response to?
A. Water B. Light C. Gravity D. Touch
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Who is known as the Father of Genetics?
A) Charles Darwin
B) Gregor Mendel
C) Watson
D) Morgan
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
In a monohybrid cross, the F2 phenotypic ratio is:
A) 3:1
B) 1:2:1
C) 2:1:1
D) 9:3:3:1
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
In a dihybrid cross, the phenotypic ratio in F2 generation is:
A) 1:1
B) 3:1
C) 9:3:3:1
D) 1:2:1
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
In Mendel’s experiment, tallness was:
A) A recessive trait
B) Not inherited
C) A dominant trait
D) A lethal trait
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Sex of a child is determined by:
A) X chromosome from mother
B) X chromosome from father
C) Y chromosome from father
D) Y chromosome from mother
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
How many pairs of chromosomes are present in humans?
A) 22
B) 46
C) 23
D) 44
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Variation is important for:
A) Cloning
B) Natural selection
C) Mutation
D) Growth
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Evolution is:
A) Fast process
B) Sudden event
C) Gradual change over time
D) Not a biological process
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Fossils are:
A) Remains of animals only
B) Artificial organs
C) Preserved remains of organisms
D) Only bones
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which of the following is an acquired trait?
A) Eye color
B) Rolling of tongue
C) Muscular body from exercise
D) Blood group
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Formation of new species is called:
A) Mutation
B) Natural selection
C) Speciation
D) Reproduction
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Homologous organs have:
A) Same function, different origin
B) Same origin, different function
C) Same function and structure
D) None of the above
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Wings of a bird and insect are:
A) Vestigial organs
B) Analogous organs
C) Homologous organs
D) Identical organs
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Complex organs like eyes have evolved:
A) Suddenly
B) In one generation
C) Gradually over generations
D) Through surgery
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
The earliest human-like species evolved in:
A) Europe
B) Africa
C) Asia
D) Australia
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
DNA is found in:
A) Cytoplasm
B) Nucleus
C) Ribosome
D) Mitochondria
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Heredity refers to:
A) Change in traits
B) Inheritance of traits
C) Mutations only
D) Cloning traits
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which factor influences evolution the most?
A) Lifestyle
B) Environment
C) Education
D) Food habits
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Genetic drift is:
A) Gradual change
B) Sudden change in population
C) Selection of traits
D) Artificial breeding
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Darwin proposed the theory of:
A) Mutation
B) Inheritance of acquired traits
C) Natural selection
D) Cloning
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Mendel conducted his experiments on:
A) Maize
B) Tomato
C) Pea plant
D) Sunflower
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Alternative forms of a gene are called:
A) Traits
B) Alleles
C) Chromatids
D) Loci
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Recessive traits are expressed when:
A) One allele is recessive
B) Both alleles are recessive
C) Dominant gene is present
D) None of these
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which of the following is biodegradable?
a) Plastic b) Glass c) Cotton d) Aluminium
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Ozone layer is mainly damaged by:
a) CO₂ b) CFCs c) Methane d) Oxygen
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which organism is a producer in an ecosystem?
a) Lion b) Deer c) Grass d) Mushroom
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which of these is not a greenhouse gas?
a) CO₂ b) CH₄ c) N₂ d) CFCs
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which of the following is an abiotic component of an ecosystem?
a) Bacteria b) Fungi c) Sunlight d) Grass
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What is the correct sequence of a food chain?
a) Producer → Consumer → Decomposer b) Consumer → Producer → Decomposer c) Decomposer → Producer → Consumer d) Producer → Decomposer → Consumer
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which of the following is not an example of decomposers?
a) Fungi b) Earthworm c) Bacteria d) Lion
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Accumulation of non-biodegradable substances is known as:
a) Biomagnification b) Biodegradation c) Decomposition d) Recycling
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What does a pyramid of energy show?
a) Flow of biomass b) Flow of population c) Flow of energy d) Flow of nutrients
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What happens to energy as it moves through the food chain?
a) Increases b) Remains same c) Decreases d) Disappears
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What is the least distance of distinct vision for a normal human eye?
A. 10 cm B. 25 cm C. 50 cm D. 100 cm
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which part of the eye controls the amount of light entering the eye?
A. Retina B. Iris C. Cornea D. Lens
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which part of the eye changes shape to focus light on the retina?
A. Cornea B. Pupil C. Retina D. Lens
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What causes the eye lens to become cloudy, leading to cataract?
A. Infection B. Inflammation C. Protein Clumping D. Weak Muscles
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which phenomenon is responsible for the formation of a rainbow?
A. Reflection B. Refraction C. Dispersion D. Scattering
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Why does the sky appear blue?
A. Reflection of sunlight B. Absorption of blue light C. Scattering of blue light D. Refraction
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What is the angle between two refracting surfaces of a prism called?
A. Refractive index B. Angle of refraction C. Angle of deviation D. Angle of prism
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What causes the twinkling of stars?
A. Dispersion B. Scattering C. Reflection D. Refraction
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which color of light is scattered the most in the atmosphere?
A. Red B. Blue C. Green D. Yellow
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What is the function of the retina?
A. Focus light B. Convert light into signals C. Control light D. Filter light
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What is myopia?
A. Near objects are blurred B. Distant objects are blurred C. Both are clear D. None
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which lens is used to correct myopia?
A. Convex lens B. Concave lens C. Cylindrical lens D. Bifocal lens
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which lens is used to correct hypermetropia?
A. Concave lens B. Convex lens C. Bifocal lens D. Cylindrical lens
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What is the phenomenon of splitting white light into colors called?
A. Reflection B. Refraction C. Dispersion D. Absorption
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which color bends the most when white light passes through a prism?
A. Red B. Violet C. Green D. Blue
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What is the band of colors formed by dispersion called?
A. Band B. Prism Band C. Spectrum D. Rainbow Band
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What is the cause of advance sunrise and delayed sunset?
A. Scattering B. Dispersion C. Reflection D. Refraction
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Why does the sun appear reddish during sunrise and sunset?
A. Absorption B. Longer path & scattering C. Dispersion D. Refraction
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What is the term for the ability of the eye to focus on near and distant objects?
A. Adjustment B. Focusing C. Accommodation D. Refraction
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which condition results from loss of accommodation power in old age?
A. Myopia B. Hypermetropia C. Astigmatism D. Presbyopia
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What is the name of the transparent front part of the eye that covers the iris and pupil?
A. Lens B. Retina C. Cornea D. Iris
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which condition causes blurred or distorted vision due to an irregularly shaped cornea or lens?
A. Myopia B. Hypermetropia C. Presbyopia D. Astigmatism
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What type of lens is used in spectacles for presbyopia?
A. Convex lens B. Concave lens C. Cylindrical lens D. Bifocal lens
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which part of the eye forms the image?
A. Cornea B. Retina C. Lens D. Pupil
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which cells in the retina are sensitive to bright light and color?
A. Rods B. Cones C. Fibres D. Optic nerves
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which phenomenon is responsible for the formation of mirages?
A. Reflection B. Refraction C. Dispersion D. Scattering
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What is the function of the optic nerve?
A. Focus light B. Produce tears C. Send signals D. Control eye muscles
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which layer of the eye is rich in blood vessels and provides nourishment?
A. Retina B. Sclera C. Choroid D. Iris
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What type of lens is used in a magnifying glass?
A. Concave B. Convex C. Plane D. Cylindrical
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which of the following is not a state of matter?
A. Solid
B. Liquid
C. Energy
D. Gas
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What is the physical nature of matter?
A. Continuous
B. Made up of particles
C. Made of waves
D. Massless
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which of the following has a definite shape and volume?
A. Gas
B. Liquid
C. Solid
D. Plasma
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which process converts liquid into vapour?
A. Condensation
B. Sublimation
C. Evaporation
D. Freezing
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What happens to the temperature during the melting of ice?
A. Increases
B. Decreases
C. Remains constant
D. Doubles
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What is sublimation?
A. Liquid to gas
B. Gas to solid
C. Solid to gas
D. Liquid to solid
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which state of matter has the weakest intermolecular force?
A. Solid
B. Liquid
C. Gas
D. Plasma
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What is the SI unit of force?
A. kg, B. m/s², C. N, D. J
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
First law of motion is also known as the law of:
A. Acceleration, B. Inertia, C. Action-Reaction, D. Momentum
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which quantity is vector?
A. Speed, B. Distance, C. Velocity, D. Mass
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
The slope of a distance-time graph gives:
A. Acceleration, B. Speed, C. Displacement, D. Force
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What causes a change in the state of motion?
A. Gravity, B. Mass, C. Force, D. Inertia
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Acceleration is defined as:
A. Speed/Time, B. Velocity/Time, C. Distance/Time, D. Force/Mass
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which of the following is a scalar quantity?
A. Displacement, B. Force, C. Distance, D. Velocity
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Momentum is the product of:
A. Force × Time, B. Mass × Velocity, C. Speed × Time, D. Force × Acceleration
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
SI unit of momentum is:
A. kg m/s, B. N, C. J, D. m/s²
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
SI unit of momentum is:
A. kg m/s, B. N, C. J, D. m/s²
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What is the unit of work?
A. Watt, B. Newton, C. Joule, D. kg m/s²
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Work is said to be done when:
A. Force acts without displacement, B. No force is applied, C. Force and displacement are perpendicular, D. Force causes displacement
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Power is defined as:
A. Work × Time, B. Force/Time, C. Work/Time, D. Energy × Time
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
One horsepower is equal to:
A. 746 W, B. 500 W, C. 1 kW, D. 1000 W
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which of the following has the highest inertia?
A. Ball, B. Pen, C. Truck, D. Book
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
SI unit of energy is:
energy.
A. Watt, B. Joule, C. Newton, D. Calorie
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which of the following represents uniform motion?
A. Changing direction, B. Equal distance in equal time, C. Increasing speed, D. Decreasing speed
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Work done is zero when:
A. Force = 0, B. Displacement = 0, C. Force ⊥ Displacement, D. All of the above
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
When two forces act in opposite directions, net force is:
A. Sum of both, B. Difference of both, C. Product of both, D. Zero
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Gravitational force is:
A. Contact force, B. Non-contact force, C. Balanced force, D. Tension force
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Weight of an object is:
A. Same everywhere, B. Mass, C. Constant, D. Force acting on mass
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What is the SI unit of work?
A. Joule B. Newton C. Watt D. Pascal
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Work is said to be done when:
A. Force is applied B. Object moves C. Both force and displacement D. Time is involved
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
When is the work done considered zero?
A. Force and displacement in same direction B. Displacement is zero C. Force is applied D. Object is moving
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
A coolie carrying a load on his head moves on a horizontal road. The work done is:
A. Positive B. Negative C. Zero D. Can't be determined
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Work done against gravity is:
A. Zero B. Negative C. Positive D. Variable
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Power is defined as:
A. Work × Time B. Work / Time C. Force × Time D. Displacement / Time
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
SI unit of power is:
A. Joule B. Watt C. Newton D. Horsepower
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
A man does 100 J of work in 10 s. Power is:
A. 10 W B. 1000 W C. 0.1 W D. 1 W
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Commercial unit of energy is:
A. Joule B. Watt C. Kilowatt-hour D. Calorie
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
1 kilowatt-hour equals:
A. 3600 J B. 1000 J C. 3.6 × 10⁶ J D. 1.6 × 10⁻¹⁹ J
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Energy possessed by a body due to its motion is:
A. Potential B. Heat C. Kinetic D. Solar
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Work done is positive when
A. Force opposite to displacement B. Force perpendicular to displacement C. Force and displacement in same direction D. Displacement is zero
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
The energy of a body due to its position above the ground is:
A. Heat B. Chemical C. Kinetic D. Gravitational potential
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
The formula for kinetic energy is:
A. mv B. mv² C. ½ mv² D. mg
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Power of a machine is 1 kW. How much work does it do in 1 hour?
A. 1000 J B. 1 J C. 3600 J D. 3.6 × 10⁶ J
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Work done when a body is displaced at right angles to the force is:
A. Maximum B. Positive C. Negative D. Zero
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
A person climbs a hill. The energy used is:
A. Kinetic B. Potential C. Light D. Heat
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
The ability to do work is called:
A. Power B. Force C. Energy D. Momentum
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
A machine does 2000 J of work in 20 seconds. Power is:
A. 200 W B. 1000 W C. 20 W D. 40 W
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What is the basic unit of kidney?
a) Nephron b) Neuron c) Alveoli d) Axon
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which part of the brain controls voluntary actions?
a) Cerebellum b) Cerebrum c) Medulla d) Spinal Cord
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which hormone regulates sugar level in blood?
a) Insulin b) Adrenaline c) Thyroxine d) Estrogen
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
Which gas is released during photosynthesis?
a) Oxygen b) Carbon dioxide c) Nitrogen d) Hydrogen
Ajay
300 Points- Mahak goyal (21300) Points
- Latest Answer:
- In: foundation
What is the site of fertilization in humans?
a) Uterus b) Ovary c) Fallopian tube d) Cervix
Ajay
300 Points- shoyab (350) Points
- Latest Answer: 4 months ago
- In: foundation
If the points (– 2, 1), (a, b) and (4, – 1) are collinear and a – b = 1, then find the values of a and b.
If the points (– 2, 1), (a, b) and (4, – 1) are collinear and a – b = 1, then find the values of a and b.
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