question_answer

At low pressure, Vander Waal's equation is reduced to\[\left( P+\frac{a}{V_{m}^{2}} \right)\,\,{{V}_{m}}=RT\]. The compressibility factor can be given as :-                

A)  \[1-\frac{a}{{{V}_{m}}RT}\]

B)  \[1+\frac{a}{{{V}_{m}}12T}\]

C)  \[1-\frac{RT{{V}_{m}}}{a}\]

D)  \[1+\frac{RT{{V}_{m}}}{a}\]