Question

How many types of changes are there?

Answer 1

Answer:

Explanation:

on the basis of physical and chemical properties of a substance, there are two changes:-

1. physical change - there is only change in the shape, size and other physical properties

2. chemical changes - there is change in the chemical composition as well as there might be a change in the physical properties

on the basis of action or change taking place in the substance, there are two changes:-

1. irreversible change - change which can't be undone. all chemical changes are irreversible in nature and also some physical changes are irreversible in nature

2. reversible change - change that can be undone. all physical changes except a few are reversible in nature and none of the chemical changes are reversible in nature

Answer 2

there are two types of changes in matter i. e.p physical change and chemical change.

Explanation:

Chemical change:the change which cannot be reversed.

Physical change:the change in which the chemical properties of matter does not change.Only change of shape ,size or state occurs.