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Kinetic Theory of Gases

The average v...

Question

The average velocity of molecules of a gas of molecular weight M at temperature T is.

A

\sqrt{\frac{3 R T}{M}}

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B

\sqrt{\frac{8 R T}{M}}

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C

\sqrt{\frac{2 R T}{M}}

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D

zero

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Solution

The correct option is C zero
Molecules of gas have a random motion. Thus the velocity vectors cancel each other and the 'average velocity' of gas is zero.
Hence option D is correct.

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