Question

Write any three difference between a physical change and a chemical change

Answer 1

Meaning

Physical change refers to a change in which the molecules are rearranged but their internal composition remains same.
Chemical Change is a process in which the substance transforms into a new substance, having different chemical composition.

Nature

Reversible
Irreversible

Involves

Change in physical properties of the substance, i.e. shape, size, color etc.
Change in chemical properties and composition of the substance.

Answer 2

physical changes are not reversible while chemical are reversible

physical changes take time while chemical changes don't take time

physical changes is not in the hand of humans while chemical changes are in the hand of humans