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# Average velocity of the molecules of a gas in a container moving in one dimension is

$(a)\;Zero\qquad(b)\;Positive\qquad(c)\;Negative\qquad(d)\;\sqrt{\large\frac{8RT}{\pi m}}$

I know beforw that ansr 1

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A)
The average velocity of gas molecules in a container moving in one direction is zero , otherwise all molecules will be collected in one direction.
Hence answer is (a)