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Types of Adsorption:-there are two main type of adsorption:

  1. Physical adsorption [physisorption]:-When a gas is held (adsorbed) on the surface of a soild by vander waals forces without forming any chemical bond between adsorbate and adsorbent it is called physical adsorption. Ex. Adsorption of CO2 gas on the charcoal.
  2. Chemical adsorption [chemisorption]:-when a gas is held (adsorbed) on the surface of a solid by forces similar to those of a chemical bond the type of adsorption is called chemical adsorption. This type of adsorption leads to the formation of a surface compound.

Differences between chemisorption and physisorption:-

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