Q.

The collision frequency of the molecules of a gas at a temperature is 

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a

Inversely proportional to the average speed of the molecule

b

Inversely proportional to the number density of molecules

c

Directly proportional to the diameter of a molecule 

d

Directly proportional to the square of diameter of a molecule

answer is B.

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Detailed Solution

Collision frequency,  f=πd2Vn

                        f  α  d2;  V;   n

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