Chemistry - Real Gas Question with Solution | TestHub

Compressibility factor $Z=\frac{PV}{nRT}$; for ideal gas, $Z=1$.

$Z<1$ means the real gas is more compressible than an ideal gas.

At low pressure, $T>T_B$ gives $Z>1$, while $T<T_B$ gives $Z<1\to$ (B) is actually incorrect.

At very high pressure, repulsive forces dominate, so $Z>1$ and compressibility is less than ideal $\to$ (C) and (D) are not both valid.

Therefore, the given answer B, C, D appears inconsistent; check the exact wording of the question/options.