Question

# The root mean square velocity of an ideal gas at constant pressure varies with density (d) as:

A
d2
B
d
C
d
D
1/d

Solution

## The correct option is D √1/d  Root mean square velocity is given as: μrms=√3RTM also, PM=dRT, where d is density substituting for RT/M in μrms expression we get, μrms=√3Pd So, μrms∝1√d

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