The experimental adsorption date of a gas on a solid surface at temperature t exhibits the following variation with pressure. v is the volume of gas adsorbed. w

The experimental adsorption date of a gas on a solid surface at temperature T exhibits the following variation with pressure. V is the volume of gas adsorbed. Which of the following is true: (a) Heat of coverage varies linearly with temperature (b) Adsorption is multilayer. (C) Heat of adsorption is independent of coverage. (d) Complete coverage cannot be determined.