Question

Given that

Gas	$H_2$	$C{H}_4$	$C{O}_2$	$S{O}_2$
Critical Temperature $\left(K\right)$	$33$	$190$	$304$	$630$

On the basis of data given above, predict which of the following gases shows least adsorption on a definite amount of charcoal?

• A. $H_2$
• B. $C{H}_4$
• C. $S{O}_2$
• D. $C{O}_2$

Answer 1

Answer: (A)

$H_2$

Smaller the value of ${}^{\prime }{a}^{\prime }$ of the critical temperature of a gas, lesser is the extent of adsorption.

Here the critical temperature of the $H_2$ gas is lowest. So the least adsorbed gas is $H_2$.