Root mean squre velocity of a gas molecule is:

M^{1 / 2}

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M^{o}

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M^{- 1 / 2}

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M

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Solution

The correct option is B $M^{- 1 / 2}$
We know,
$U_{R M S} = \sqrt{\frac{3 R T}{M}}$
Hence it is related to Molar mass $M$ as $M^{- \frac{1}{2}}$

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