MCQ Questions for class 7 Science Physical and Chemical Changes

Q1. Properties such as shape, size, colour and state of a substance are called its _________ properties.

1. Chemical
2. Rust
3. Mixture
4. Physical

Q2. A change in which a substance undergoes a change in its physical properties is called a ________ change

1. Physical
2. Chemical
3. Properties
4. None of the above

Q3. A physical change is also called __________ change.

1. Irreversible
2. Chemical
3. Reversible
4. None of the above

Q4. In which of the following changes no new substances is formed?

1. Physical change
2. Chemical change
3. Both physical and chemical change
4. None of the above

Q5. If a piece of iron is left in open for sometime it acquire a brownish substance called _______

1. Soild
2. Magnesium
3. Glass
4. Rust

Q6. The process of acquiring rust on iron is called_________

1. Sorting
2. Scouring
3. Rusting
4. All of the above

Q7. Chemical changes are also called _______ changes

1. Irreversible
2. No change
3. Reversible
4. None of the above

Q8. Stretching of a rubber is a _______ change

1. Chemical
2. Irreversible
3. Physical
4. None of the above

Q9. This process of depositing a layer of zinc on iron is called ______

1. Chemical change
2. Crystallisation
3. Galvanisation
4. None of the above

Q10. When carbon dioxide is passed through lime water, it turns milky due to the formation of ______

1. Calcium
2. Carbon dioxide
3. Magnesium
4. Calcium carbonate

Q11. Conversion of milk into curd is a _______ change.

1. Supernatural
2. Natural
3. Chemical
4. Physical

Q12. Rusting of iron can be prevented by which of the following method?

1. Rubbing
2. Throwing water
3. Keeping it in open place
4. Coating of paint

Q13. Which of the following are responsible for rusting of iron?

1. Water
2. Only oxygen
3. Oxygen and water
4. Carbon and oxygen

Q14. The chemical name of baking soda is ______

1. Sodium hydroxide
2. Calcium carbonate
3. Sodium hydrogen carbonate
4. None of the above