Question

define the following with example
physical reaction.

Answer 1

Hii...

The physical reaction are reversible,change is not permanent....

e.g
Colling of water

Answer 2

Physical changes occur when objects or substances undergo a change that does not change their chemical composition. This contrasts with the concept of chemical change in which the composition of a substance changes or one or more substances combine or break up to form new substances.example:

Crushing a can.

Melting an ice cube.

Boiling water.

Mixing sand and water.

Breaking a glass.

Dissolving sugar and water.

Shredding paper.

Chopping wood.

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