Question

Science

A. True and False (1x4=4)
1. Chopping onion is a reversible change.
2. Burning of paper is an irreversible change.
3. Iron and rust are the same substances.
4. Cooling of milk is a reversible change.
5. While playing, you accidentally fall into a swimming pool and wet your clothes. Can you reverse this change?(2)
6. State if the following is reversible or an irreversible change. (2)
i) sawing of a piece of wood.
ii) Burning of paper.
iii) Melting of ice cream.
iv) Burning of matchstick.
7. How is inflating a balloon different from bursting an inflated balloon? Explain.(2)​

Answer 1

1)false

2)true

3)false

4)true

5)true

6)i) Irreversible

ii) Irreversible

iii) reversible

iv) irreversible

7)Inflating balloon is a reversible change whereas bursting inflated balloon is a irreversible change.

Answer 2

Answer:

1.False

2.True

3. False

4.True

5.Yes