Question

A gas exerts pressure on the walls of its container because

• A. Particles of the gas react with the walls of the container.
• B. The particles of a gas are static.
• C. The particles of a gas hit the walls of the container.
• D. The particles of a gas react with each other.

Answer 1

The correct option is C

The particles of a gas hit the walls of the container.

In gaseous state, the particles move randomly. So, sometimes they hit each other and the walls of the container. The pressure exerted by the gas is because of the force exerted by the gas particles on the walls of the container.