Question

The extent of adsorption of a gas on a solid depends on :
A. Nature of the gas
B. Pressure of the gas
C. Temperature of the gas
D. All of the above

Answer 1

Hint: Adsorption is the phenomenon by which molecular species gather on the surface rather than going deeper into the volume of a solid or liquid. Adsorption take place between adsorbate and adsorbent. It depends on pressure, temperature and nature of the gas that is adsorbed on a solid surface.

Complete Step by Step Solution:
Adsorption takes place due to dispersion of liquid or gas on solid substances.
The extent of adsorption of a gas on a solid depends on the following cases:
The extent of adsorption of a gas on a solid substance depends on the nature of the gas.

For example easily liquefiable gases are readily adsorbed than gases that do not liquefy easily.
The extent of adsorption of a gas on a solid depends on the pressure of the gas.
With increase in the pressure, the extent of the adsorption increases.
The extent of adsorption of a gas on a solid depends on the temperature of the gas.

Adsorption is an exothermic process so, increase in temperature will decrease the extent of adsorption. The extent of adsorption of a gas on a solid depends on the nature and surface area of the adsorbent. With the increase in the surface area of the adsorbent the extent of adsorption also increases.
Thus the correct option is D.

Note: Adsorption is dependent on the nature of the gas. Thus the extent of adsorption of a real gas will be different from the extent of adsorption of an ideal gas.