The figure shows the effect of pressure on the compressibility factor, Z of a gas The wrong conclusions(s) is (are) :

Options

A. The curve AE can be explained by PV=RT
B. The curve AF and CD can be explained by PV=RT+Pb
C. The curve AB can be explained by PV=RT-`a/V`
D. All the three curves AF,AE and AD shows the real behaviour

Answer

D

Explanation

(A)For AE, Z = constant `implies PV=RT`
(B)At higher pressure PV=RT+Pb
( C)At lower pressure `PV=RT-a/V`