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Kinetic Theory of Gases

Which of the ...

Question

Which of the following gas molecule has the largest mean free path at the same pressure and temperature ?

A

H_{2}

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B

N_{2}

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C

O_{2}

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D

C l_{2}

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Solution

The correct option is A $H_{2}$
Mean free path is the average distance travelled by a moving particle between successive collisions. Mean free path is inversely proportional to molar mass. So, smaller the molar mass, higher the mean free path.
So as hydrogen has the smallest molar mass, it has the largest mean free path.

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Kinetic Theory of Gases

Standard XI Chemistry

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