Question

Give reason:
The gas exerts pressure on the wall of a container.

Answer 1

because the molecules of a gas have the maximum kinetic and they try to run away from each other.

Answer 2

Because in the gaseous state, the particles move about randomly at high speed. Due to this random movement, the particles hit each other and also the walls of the container. The pressure exerted by the gas is because of this force exerted by gas particles per unit area on the walls of the container.