Question

what do you mean by physical and chemical changes?​

Answer 1

Physical Change: A change which is reversible is called as Physical change.

Chemical change:A change in which the object undergo a chemical process and form a new substance,and it is not reversible

Answer 2

there are two types of changes:

I. PHYSICAL

II. CHEMICAL

I. PHYSICAL CHANGE: It is a type of change in which the now new substance is formed. In this reaction, Reactant can be obtained by reversing the order of reaction. It is known as reversible change.

Eg, Streching of rubber band,etc.

II. CHEMICAL CHANGE: It is a type of change in which reactants react to form a new product and the reverse of reactions are not possible. They are known as irreversible reactions.

Eg, Rancidity, burning of paper,etc