Chemistry - Surface Chemistry Question with Solution | TestHub

More easily liquefiable gases are adsorbed readily.

Under high pressure it results into multi molecular layer on adsorbent surface.

Enthalpy of adsorption$\left[\mathrm{\Delta }{\mathrm{H}}_{\mathrm{a}\mathrm{d}\mathrm{s}\mathrm{o}\mathrm{r}\mathrm{p}\mathrm{t}\mathrm{i}\mathrm{o}\mathrm{n}}\right]$is low and positive

It occurs because of van der Waal’s forces.