Given: On the basis of data given above, predict which of the...

Method $1$:
The extent of adsorption is directly proportional to the critical temperature. As ${H}_{2}$ has the lowest critical temperature, it will have the lowest extent of adsorption.

Method $2$:
The value of adsorption is dependent on the intermolecular forces of attraction. Among the given options, ${H}_{2}$ will have the weakest van der Waal's force (London Dispersion), in which only $2$ electrons are involved.

Hence, as a force of attraction is the weakest for ${H}_{2},$ it will have the lowest adsorption value.