Question

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

• A. Gaseous particles are hardest among the states of matter.
• B. Gaseous particles doesn't exert pressure on the walls of the container
• C. Gaseous particles move randomly and frequently collide with walls. Pressure is resultant of these collisions.
• D. Gaseous particles do not move.

Answer 1

The correct option is C

Gaseous particles move randomly and frequently collide with walls. Pressure is resultant of these collisions.

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.