Which of the following is not a chemical change?

The correct answer is option 1. Beating aluminium to make aluminium foil.

A change in which one or more new substances are formed is called a chemical change.

For example, digestion of food in our body, ripening of fruits, fermentation of grapes, burning of coal, Photosynthesis etc., happen due to series of chemical changes

A change in which a substance undergoes a change in its physical properties is called a physical change.

Beating aluminium to make aluminium foil: malleability (beating metal into then sheets) does not change composition.