Question

A gas exerts pressure on the walls of the container. Identify the correct reason for the same.

• A. Gaseous particles are at fixed positions
• B. Gaseous particles have large space between them
• C. Gaseous particles move randomly and frequently collide with walls
• D. Gaseous particles have large attractive forces between them

Answer 1

The correct option is C

Gaseous particles move randomly and frequently collide with walls

The particles of a gas are moving around constantly in random directions and frequently collide with the walls of the container or each other. When a molecule collides with the wall, they exert a small force on the wall. The pressure exerted by the gas is due to the sum of these collision forces.

More the particles hitting the wall, greater the pressure.