At any particular time, different particles in the gas
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a
have same speed and kinetic energy
b
have same speed but different kinetic energies
c
have different speeds but same kinetic energy
d
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.