Changes Around Us

1.Can all changes always be reversed ?

• Yes

• No

• none of these

• all of these

2. State whether burning of a piece of paper is a reversible or an irreversible change ?

• Its a irreversible change

• its a reversible change

3. Which of the following can be reversed ?

• Milk to paneer

• Cold milk to hot milk

• Yam to kitted sweater

• All of these

• none of these

4. Can we say that ironing of cloth is a reversible change ?

• Yes

• No

• Both yes & no

5. how change can occur ?

• All of these

• By cooling a substance

• Heating of a substance

• mixing it with some other

6. Do you think a change occured in water or salt can be revers ?

• True

• False

7. On heating a rim

• depends how much it is heated

• Contracts

• Expands

8. The process of converting solid directly into gas is known as _____________

9. A change that occurs during a definite time interval is known as__________

10. Which of the following is a chemical change

• Evaporation of water

• Burning of fuels

• Moving of a wheel

• Breaking of a brick