Question

A gas exerts presume on the walls of the container. Assign reason

Answer 1

A gas exerts pressure on the walls of the container due to simultaneous elastic collisions taking place among the gas particles themselves and of the gas particles with the walls of the container.

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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.