At any particular time, different particles in the gas

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have same speed and kinetic energy

have same speed but different kinetic energies

have different speeds but same kinetic energy

have different speeds and hence different kinetic energies

answer is D.

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Detailed Solution

At any particular time, different particles in the gas have different speeds and hence different kinetic energies.This assumption of kinetic molecular theory of gases is reasonable because as the particles collide, wo expect their speed to change.

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