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Question

The ratio of the root mean square speed of H2 gas at 50 K and that of O2 gas at 800 K is:

A
4
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B
2
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C
1
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D
0.25
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Solution

The correct option is C 1
u(H2) at 50 K=3R×502
u(O2) at 800 K=3R×80032
u(H2)u(O2)=50×322×800=1
ratio of rms of H2(50 K) and O2(800 K)
u(H2 at 50 K)u(O2 at 800 K)=1

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