Question

Give an example of a physical change which occurs by the action of heat.

Answer 1

A physical change is a change in which the chemical composition of the substance does not alter and no new substances are formed.

• The melting of ice is an example of a physical change that occurs by the action of heat.
• Water obtained after the melting of ice is not a new substance as the chemical composition is not different from that of ice but there is just a change of state.
• Hence it is a physical change by the action of heat.