A gas obeys `P(V-b)=RT`. Which of the following are correct about this gas?
(`I`) Isochoric curves have slop `=(R )/(V-b)`.
(`II`) Isobaric curves have slope `(R )/(P)` and intercept `b`.
(`III`) For the gas compressibility factor `=1+(Rb)/(RT)`.
(`IV`) The attraction forces are overcome by repulsive forces.

Options

A. `I`
B. `II`, `III`
C. `III`
D. `I`, `II`, `III`, `IV`

Explanation

`P(V-b)=RT`
`d=(R )/((V-b)).Timplies slope=(R )/(V-b)`
`PV-Pb=RT`
`V=(RT)/(P)+b` `slope =(R )/(P)` and intercept `b`
`V=(PV)/(RT)=1+(Pb)/(RT)`, `Zgt1`
i.e., repulsive forces predominate.