Question

define physical chenge and chemical change​

Answer 1

Answer:

The difference between a physical reaction and a chemical reaction is composition. In a chemical reaction, there is a change in the composition of the substances in question; in a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition.

Answer 2

Answer:

In a physical change no new substance are formed but in chemical change a new substance is formed.

Physical changes are reversible but chemical change are irreversible