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At STP,  the correct order of root mean square velocity of molecules of H2, N2, O2 and HBr is

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By Expert Faculty of Sri Chaitanya
a
N2 > HBr > O2 > H2
b
H2 > N2 > O2 > HBr
c
HBr > H2 > O2 > N2
d
H2 > O2 > HBr > N2

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detailed solution

Correct option is B

At same temperature lower the molar mass higher is the RMS velocity.C=3RTM; C ∝1M ;


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The factor by which RMS velocity of a gas at a given temperature will be higher than its most probable velocity by

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