The units of van der Waal's constant a and b respectively are

Options

A. `L^(-2)atm^(-1)mol^(-1)" and" L mol^(-2)`
B. `L^(2)atmmol^(-2)" and" mol^(-1)`L
C. `Latmmol^(2)" and" mol`L
D. `Latm^(2)mol^(-1)" and" mol L^(-1)`

Answer

B

Explanation

(b) `therefore` Units of a `=(pV^(2))/(n^(2))=(atmxxL^(2))/(mol^(2))=L^(2)atmmol^(-2)`
`therefore`Units of `b=(V)/(n)=(L)/(mol)=mol^(-1)L`