Question

why formation of cloud is a physical change

Answer 1

Clouds are formed after the water from the earth evaporates, goes up in the sky and condenses.

Again the cloud changes to water and falls on earth as rain due to the process of precipitation.

This is a cyclic process, and the cycle continues.

So the formations of clouds are known as physical changes.

Answer 2

As the water evaporates and become steam this will become cloud and the clouds will bring rain and this will make the gas into water state i.e. liquid state to gas state and gas state to liquid state and there is no change in chemical composition