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Question

Density ratio of O2 and H2 is 16:1. The ratio of their rms velocities will be :

A
4:1
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B
1:16
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C
1:4
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D
16:1
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Solution

The correct option is C 1:4
Density ratio of O2 and H2 is 16:1. The ratio of their RMS velocities will be 1:4. This is because rms speed is inversely proportional to the square root of density.

rmsO2rmsH2=dH2dO2=116=14

Hence, the correct option is C

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