Question

Classify the following as physical or chemical change.

(i) Crushing a piece of chalk

Answer 1

Part I - Definition

Physical change - A change in which no new substance is formed and only there is a change in shape, and size is termed as physical change.

Chemical change - A change in which new substances in form of products are formed is termed a chemical change.

Part II - Classification

Crushing a piece of chalk is a physical change as there is no change in the molecular composition of chalk and chalk powder.

Therefore, Crushing a piece of chalk is a physical change