Physical and Chemical Changes MCQ Questions for Class 7 Science Chapter 6 with Answers

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All questions answers in the last paragraph

Q1. A change that affects iron articles and slowly destroys them is:

(A) Rusting
(B) Galvanisation
(C) Chemical change
(D) Crystallisation

Q2. The process of forming substances in their pure state from their solution is known as:

(A) galvanisation
(B) neutralisation
(C) crystallisation
(D) all of these

Q3. A chemical change may bring

(A) evolution of gas
(B) change in colour
(C) change in taste
(D) all of these

Q4. Which of the following is an example of physical change?

(A) A bud turning into a flower
(B) Rusting of iron
(C) Boiling of water
(D) Ripening of a tomato

Q5. Which of the following changes is accompanied by sound?

(A) Photosynthesis
(B) Spoilage of food
(C) Explosion of fire works
(D) None of these

Q6. Which of the following is a chemical change?

(A) Bursting of a fire cracker
(B) Germination of seed
(C) Coal formation from buried trees
(D) All of these

Q7. The product formed by dissolving a substance into another is called

(A) Solution
(B) Compound
(C) Mixture
(D) Solvent

Q8. n chemical change

(A) Change is reversible
(B) Molecules of a substance change
(C) Molecules of the substance do not change
(D) Substance remain same

Q9. Beating the alluminium in the boil is a:

(A) chemical change
(B) rusting
(C) physical change
(D) none of these

Q10. Properties like size, shape, colour, state of a substance are

(A) chemical properties
(B) mental properties
(C) physical properties
(D) physico-chemical properties

Q11. Which among the following is a physical change?

(A) Burning of wood
(B) Ripening of fruit
(C) Cutting a log of wood in small pieces
(D) Cooking of food

Q12. Ships suffer a lot of damage from rusting inspite of being painted because:

(A) sea water contains many salts
(B) sea water is bitter
(C) sea water is sour
(D) sea water is sweet

Q13. The process of depositing a layer of zinc over iron is known as

(A) aluminisation
(B) galvanisation
(C) fertilisation
(D) ironing

Q14. Which of the following is a chemical change?

(A) Dissolving of common salt into water
(B) Changing of water into ice
(C) Melting of ice
(D) Rusting of iron

Q15. When you leave a piece of iron in the open for some time, it acquires a film of brownish substance. The substance is called:

(A) acid
(B) base
(C) rust
(D) none of these

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