Question

True or False
1. A change in which the chemical composition of a substance
changes is called physical change.

2.In a physical change, a considerable change of energy is involved.

3.Cooking of rice is a reversible change.

4.Melting of butter is a chemical change.

5.Changing of iron and sulphur into iron on heating,is a chemical change
​

Answer 1

Explanation:

1-false

2-i don't know

3-false

4-true

5-false

Answer 2

3.false 4.true 5.true