The units of the van der Waals constant `a` are

Options

A. `mol L^(-1)`
B. `atm L^(-2) mol^(2)`
C. `atm L^(2) mol^(-2)`
D. `L mol^(-1)`

Answer

C

Explanation

The correction term for pressure has the units of atmosphere. Thus,
`(an^(2))/(V^(2)) rArr atm`
or `a rArr (atm V^(2))/(n^(2)) rArr (atm L^(2))/(mol^(2))`
The correction term for volume has the units of liter. Thus, `nb rArr Liter`
`b rArr ("Liter")/(n) rArr ("Liter")/("mole")`