For a non-zero value of force of attraction between the gas molecules and zero volume occupied by the gas molecules, give a modified expression of van der Waals' equation.

Explanation

According to van der Waals's equation :
`[P+a((n)/(V))^(2)][V-nb] = nRT`.
For `a((n)/(V))^(2) ne 0` and `b = 0`, the equation may be written as : `[P + a ((n)/(V))^(2)] [V-0] = nRt`
or `PV + (n^(2)a)/(V) = nRT`.