If `X` is the total number of collisions that a gas molecule registers with other molecules per unit time under particular conditions, then what is the collision frequency of the gas containing `N` molecules per unit volume is ?

Explanation

We know that collision number
`Z_(1)=sqrt(2)pir^(2)u_(av)N^(*)=X`
While collision frequency
`Z_(11)=(1)/(2)Z_(1)N`
Hence, collision frequency will be
`Z_(11)=(1)/(2)NX`