| I. Isochoric curves have slope =\[\frac{V-b}{R}\] |
| II. sobaric curves have slope \[\frac{R}{P}\] and intercept b. |
| III. For the gas, compressibility factor = \[1+\frac{Pb}{RT}\] |
| IV. The attraction forces are overcome by repulsive forces. |
A) I
B) II, III, IV
C) III
D) I, II, III, IV
Correct Answer: B
Solution :
[b] \[P(V-b)=RT\] \[P=\frac{R}{(V-b)}=T\Rightarrow \]Slope \[=\frac{R}{V-b}\] \[PV-Pb=RT\] \[V=\frac{RT}{P}+b\], slope\[=\frac{R}{P}\]and intercept b \[\frac{PV}{RT}=1+\frac{Pb}{RT};Z>1\] i.e., repulsive forces predominate.
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