Q.

In a dilute gas at pressure P and temperature T, the mean time between successive collisions of a molecule varies with T as :

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a

T

b

1T

c

1T

d

T

answer is A.

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Detailed Solution

Mean free path  λ=RT2πd2NAP
So mean time between successive collisions is
τ=λvrms=RT2πd2NAP3RTM  

 So  τ T
 

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In a dilute gas at pressure P and temperature T, the mean time between successive collisions of a molecule varies with T as :