Ans- As stated in Class 12 Surface Chemistry notes, There are two types of adsorption on the basis of the type of forces acting between constituents.
Physisorption
Chemisorption
Arises due to Van Der Waal’s forces
Arises due to the formation of chemical bonds
Non-specific in nature
Highly specific in nature
Reversible
Irreversible
Depends on the nature of gas
Low enthalpy of adsorption
High enthalpy of adsorption
Low temperature is favorable
High temperature is favorable
No appreciable activation energy needed
Sometimes high activation energy is needed
Depends on the surface area
Multimolecular layers are formed
The unimolecular layer is formed
These topics can also be downloaded from surface chemistry class 12 notes pdf download.
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