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Mean Free Path, Collision Frequency

RMS velocity ...

Question

RMS velocity of which of the following gas at a given temperature is minimum?

O_{2}

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N_{2}

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C l_{2}

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H e

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Solution

The correct option is C $C l_{2}$
$v_{r m s} = \sqrt{\frac{3 R T}{m}}$

So the root mean square velocity of the gas in inversely proportional to the mass at a particular temperature.

So, $C l_{2}$ will have least value of $v_{r m s}$ .

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