Which of the following statements is false during adsorption of gas molecule on a metal surface?

According to the question, Adsorption is reversible in nature and is dependent on pressure as well as temperature. An increase in pressure decreases the volume of gas and thus increases the adsorption of gas molecules. Conversely, a decrease in pressure will cause the removal of gas molecules from the solid surface.

The amount of heat evolved when one mole of an adsorbate (gas or liquid) is adsorbed on the surface of an adsorbent is called enthalpy of adsorption. The enthalpy of adsorption for chemo sorption is larger than that for physical adsorption. The magnitude of enthalpy of adsorption for chemo sorption & physical adsorption are  in order of $-400$ Kj per mol and $-20 \mathrm{to} -40$ Kj per mol.