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At STP, the order of root mean square velocities of molecules of and is
(a)
(b)
(c)
(d)

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Important Questions on Kinetic Theory of Gases
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Consider an ideal gas confined in an isolated closed chamber. As the gas undergoes an adiabatic expansion, the average time of collision between molecules increases as , where is the volume of the gas. The value of is:

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Boltzmann Constant
Avogadro number
Radius of Earth:
Gravitational acceleration on Earth

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