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If most probable speed of hydrogen molecules at $27^{o} C$ is V, then the rms speed of the molecules at $127^{o} C$ is

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Correct option is D

Most probable speed 2KTm=2K×300m=VVrms=3KTm=3K×400m∴ VrmsV=3K×400m×m2K×300=126=2∴ Vrms=2V

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If most probable speed of hydrogen molecules at 27oC is V, then the rms speed of the molecules at 127oC is

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If most probable speed of hydrogen molecules at $27^{o} C$ is V, then the rms speed of the molecules at $127^{o} C$ is