Class 6th Science Chapter – 6 Changes Around Us MCQ With Answer

(1) Which of the following is a change that can be reversed ?

A. Batter to Idli
B. Grain to its flour
C. Milk to paneer
D. Stretched rubber band to its normal size

Answer – (D) Stretched rubber band to its normal size

(2) Which of the following changes in water state is a physical change ?

A. Melting
B. Condensation
C. Boiling
D. All of the above

Answer – (D) All of the above

(3) The shape and size of a pencil and eraser change with repeated use. Is it possible to undo this change ?

A. Yes, to some extent
B. No
C. May be
D. Data insufficient

Answer – (B) No

(4) A chemical change involves

A. Both a change in state and a change in composition.
B. Only a state change
C. Only a colour change
D. None of the above

Answer – (A) both a change in state and a change in composition.

(5) Rusting or iron is an example of

A. Reversible change
B. Irreversible change
C. Physical change
D. None of the above

Answer – (B) Irreversible Change

(6) What is the best way to effect change ?

A. Substance heating
B. Substance cooling
C. Combining one substance with another
D. All of the above

Answer – (D) All of the above

(7) Which of the following changes that occur in our bodies is reversible ?

A. Increase in height
B. Decrease in weight
C. Growing of nails
D. None of the above

Answer – (D) None of the above

(8) The black material for repairing road is

A. Heated
B. Cooled
C. Both heated and cooled
D. None of the above

Answer – (A) Heated

(9) Irreversible changes are _________ and ________.

A. Physical, temporary
B. Chemical, temporary
C. Physical, permanent
D. Chemical, permanent

Answer – (D) Chemical, permanent

(10) Melting of wax is a physical change because it involves

A. Change in the state from solid to liquid
B. Change in state from liquid to vapours
C. Change in state from solid to vapours
D. Change in state from liquid to solid

Answer – (A) Change in the state from solid to liquid

(11) Which of the following is the name given to the process of converting a solid into a liquid ?

A. Condensation
B. Melting
C. Evaporation
D. Freezing

Answer – (B) Melting

(12) How is clothing drying a reversible change ?

A. Because the dried clothes cannot be re-wet
B. Because dry clothing can become wet again
C. Because all of the water from the clothes had evaporated
D. All of the above

Answer – (B) Because dry clothing can become wet again

(13) A chemical change is also known as

A. Chemical process
B. Chemical reaction
C. Chemical activity
D. Chemical specie

Answer – (B) Chemical reaction

(14) What kind of change is expansion ?

A. Irreversible
B. Permanent
C. Reversible
D. All of the above

Answer – (C) Reversible

A. Because biogas can be converted back to cow dung.
B. Because a new product is formed.
C. Both (A) and (B)
D. Because chemical composition remains the same.

Answer – (B) Because a new product is formed.

16. Which of the following is an irreversible change ?

A. Shortening the length of the dress by folding
B. Cooking of food
C. Melting of ice
D. Cold milk to hot milk

Answer – (B) Cooking of food

(17) What happens when water is heated in a pan ?

A. Quantity of the water in the pan increases
B. Water starts to cool up
C. Quantity of the water in the pan decreases
D. Water changes into solid

Answer – (C) Quantity of the water in the pan decreases

(18) Which of the following is not an example of a change that occurs when two substances are mixed ?

A. Salt dissolved in water
B. Sand-water mixture
C. Sugar dissolved in water
D. Matchstick combustion

Answer – (D) Matchstick combustion