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Question

Which of the following gases has maximum value of root mean square velocity(vrms) at same temperature CO2,H2,NH3?

A
CO2
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B
H2
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C
NH3
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D
All have same velocity
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Solution

The correct option is B H2
vrms=3RTM

given, T=constant

vrms1M

Means, higher be the value of molecular mass, lower be the vrms and vice-versa.

We have MCO2=44,MH2=2,MNH3=17

Hence, vrms of H2 will be maximum.

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