Explain how adsorption of a gas on solids is affected by pressure.

During Adsorption of a gas on a solid

The correct variation for adsorption of a gases on a solid surface with pressure of the gas, in the following manner is

The correct variation for adsorption of a gases on a solid surface with pressure of the gas, in the following manner is

Explain how the adsorption of gas on solid varies with Surface area of adsorbent.

Explain the terms: Physisorption and Chemisorption. How does adsorption of a gas on a solid surface vary with pressure?