5. What are the two types of adsorption?
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 |
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 |
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.
