An ideal gas can't be liquefied because :

Given below are two statement : one is labelled as Assertion $\mathrm{A}$ and the other is labelled as Reason $\mathrm{R}$.
Assertion $\mathrm{A}:{\mathrm{SO}}_2( \mathrm{g})$ is adsorbed to a large extent than ${\mathrm{H}}_2( \mathrm{g})$ on activated charcoal.

Reason $\mathrm{R}$ : ${\mathrm{SO}}_2( \mathrm{g})$ has a higher critical temperature than ${\mathrm{H}}_2( \mathrm{g})$

In the light of the above statements, choose the most appropriate answer from the options given below.

The variation of the compressibility factor$\left(\mathrm{Z}\right)$with pressure $(\mathrm{P} \mathrm{in} \mathrm{bar})$ for some gases, are shown in the figure below. Identify the gases $\left(\mathrm{A}\right),\left(\mathrm{B}\right)$ and $\left(\mathrm{C}\right)$.

Among the following gases, the order of liquefiability is
a) ${\mathrm{SO}}_2$
b) ${\mathrm{CO}}_2$
c) ${\mathrm{CH}}_4$
d) ${\mathrm{NH}}_3$

The number of statement's, which are correct with respect to the compression of carbon dioxide from point (a) in the Andrews isotherm from the following is _________.

A. Carbon dioxide remains as a gas upto point (b)
B. Liquid carbon dioxide appears at point (c)
C. Liquid and gaseous carbon dioxide coexist between points (b) and (c)
D. As the volume decreases from (b) to (c), the amount of liquid decreases 

Which of the following gases can be absorbed in more proportion?