Which graph represents the amount of chemisorption of a gas with temperature under constant pressure?

The adsorption of a gas on the surface of a solid is generally an exothermic process because ......

What is the difference between adsorbent and adsorbate?

Discuss the effect of pressure and temperature on the adsorption of gases on solids.

Which statements among the following are correct?
$(i)$ Freundlich isotherm fails at high pressure of the gas.
$(ii)$ $\Delta H < 0$ for both physical and chemical adsorption.
$(iii)$ Physical adsorption is non-selective.
$(iv)$ Chemical adsorption is reversible,whereas physical adsorption is irreversible.

Which of the following statements is correct for chemisorption?