Adsorption is the accumulation of particles of one species on the surface of another species. Depending upon the process involved adsorption can be classified as physisorption and chemisorption. The adsorption of gases on solids depends on different factors such as the nature of the gas, temperature, pressure, etc. Freundlich isotherm explains the effect of temperature on the adsorption. Adsorption is a process of wide utility such as in the field of catalysis, handling of gases, chromatography, extraction of metals, deionization of water, etc.