The mean free path of molecules of a gas (radius r) is inversely proportional to

Options

A. `r^(3)`
B. `r^(2)`
C. `r`
D. `sqrt(r)`

Answer

B

Explanation

Mean free path`lambda = (1)/(sqrt(2)pid^(2)n)`
where `d`= molecule and `d = 2r`
`:. Lambda_(m) prop 1/(r^2)`.