The root mean square velocity of the gas molecules is 300 m/s. What will be the root mean square speed of the molecules if the atomic weight is double and absolute temperature is halved?

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300 m/s

150 m/s

600 m/s

75 m/s

answer is B.

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Detailed Solution

vrms=3RTMOr 300=3RTMAndvrms'=3R(T/2)2M=12×300=150 m/s

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