How can we identify whether the change occured is a chemical or physical change?
Physical Change | Chemical Change |
The chemical composition of a substance undergoing a physical change remains same. | The chemical composition of a substance undergoing a chemical change does not remain same. |
Most of the physical changes are reversible. | Most of the chemical changes are irreversible. |
No new substances are formed during a physical change. | Formation of new substances takes place during a chemical change. |
Little or no heat change is observed. | Considerable heat changes are involved. |
These are the some differences which can be used to distinguish physical and chemical changes.