Quick check-Physical & chemical change

1. Choose a chemical change from the following.

• Dissolution of sugar in water

• Melting of wax

• Beating of aluminium to make foils

• Photosynthesis

2. 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

3. The physical changes involve the Crushing of a chalk piece, Boiling of water, Melting of ice cream, and Evaporation of water.   True False

• True

• False

4. A physical change is generally

• (a) reversible

• (b) irreversible

• (c) considerable

• (d) all of these

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

• (a) Alienization

• (b) Galvanization

• (c) Fertilizations

• (d) Ironing

6. Which of the following changes can easily be reversed?

• (a) Chemical Change

• (b) Physical Change

• (c) Both physical and chemical changes

• (d) Neither physical nor chemical change

7. A chemical change may bring

• (a) evolution of gas

• (b) change in colour

• (c) change in taste

• (d) all of these