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4

Certain volume of a gas exerts on its walls some pressure at a particular temperature. It has been found that by reducing the volume of the gas to half its original value, the pressure becomes I twice that the initial value of constant temperature. This happens because

A. More number of a gas molecules strike the surface per second

B. Velocity of the gas molecules increases

C. Gas molecules attract each other

D. Weight of the gas increase with volume

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