Question

Differentiate between physical change and chemical change.

Answer 1

Sr No.	Characteristics	Physical Change	Chemical Change
1.	New substance	New substance is not formed.	New substance is formed.
2.	Nature	Temporary change.	Permanent change.
3.	Heat energy	It absorbs or gives out very little heat energy.	It absorbs or gives out lot of heat energy.
4.	Mass	Mass of the substance does not change.	Mass of the substance changes.
5.	Reversibility	It is easily reversible.	It is irreversible.

6.

Examples

Mixing sand and water,Breaking a glass.

Cooking an egg, Photosynthesis.