Question

Chemisorption is irreversible.
A.True
B.False

Answer 1

Hint: Adsorption is the phenomenon of accumulating the molecules of one substance on another surface. Chemisorption and physisorption are two types of adsorptions. Chemisorption is the reversible process whereas physisorption is an irreversible process.

Complete answer:
The accumulation of molecules of a gas or liquid on the surface of the solid can be called as an adsorption. It is of two types. Chemisorption and physisorption.
Simply, adsorption can be defined as the absorbance of adsorbate on adsorbent. The substance which is accumulating can be called as an adsorbate and the surface on which the process of adsorption is going can be called as adsorbent and this phenomenon can be called as adsorption.
Chemisorption involves the formation of new chemical bonds at the contact surface of the adsorbate and adsorbent. The new chemical bonds may be ionic or covalent. Due to the formation of new chemical bonds, it can be considered as an irreversible process.
Physisorption is not involved in the formation of new chemical bonds; there is the involvement of Vander Waals interaction only. It is a reversible process as there is no formation of new chemical bonds.
Chemisorption is irreversible. It is a true statement.

Note:
Simply chemisorption involves the bond formation of new chemical bonds at the surface of adsorbate and adsorbent. Thus, it is not reversible. The corrosion can also be an example of corrosion. Chemisorption is very specific in nature whereas physisorption is not specific in nature.