Why do gases exert pressure on the walls of the container?

Question

Why do gases exert pressure on the walls of the container? — Exam MCQ

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B. Gas particles move randomly and strike the walls — Gas molecules are in continuous random motion and repeatedly collide with the container walls. These collisions exert force on the walls and produce pressure.

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A. Gas particles attract the container walls strongly

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C. Gas particles stay fixed inside the container

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D. Gas particles possess very low kinetic energy

Why do gases exert pressure on the walls of the container?

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