Question

a gas exerts pressure on the walls of the container​

Answer 1

The particle of gas are moving randomly at high speed in all direction due to high kinetic energy. They vibrate constantly and collide with the walls of the container. The impact of the force of moving particles exert pressure on the walls of the container

Answer 2

Answer: the molecules in a gas have large kinetic energy. They strike the walls of the container with certain force. The force per unit area is responsible for the pressure of gas.

Explanation :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.