Question

The incorrect statement about chemisorption is:
(A) Chemisorption is shown by only those gases which react with the adsorbent.
(B) Enthalpy of chemisorption is high i.e $80 - 240kJmo{l^{ - 1}}$.
(C) It is favoured by low temperatures.
(D) None of the above.

Answer 1

Hint: Chemisorption, a solvent is reached by a large number of electrons between an adsorbent and an adsorbate to form a composite or ionic bond. Therefore, chemical adsorption may not be fully available, and may require high energy to reproduce.

Complete Step by Step Solution:
Chemisorption is the process resulting from the chemical bond between adsorbate molecules and certain surface areas of material, known as active sites. Chemisorption from electricity usually occurs only at high temperatures, and may be slow and irreversible. Many commercials rely on physical advertising; while catalysis is dependent on chemisorption. Chemisorption is an exothermic process and is a slow process at low temperatures due to high initial strength.

The initial increase in chemisorption is due to the dissipation heat acting as an active force and the additional adsorbate molecules gain energy and have greater potency than initiation power. Therefore, adsorption increases with increasing temperature. An increase in the temperature of chemisorption is usually high pressure and is accompanied by chemisorption.

Therefore, the correct answer is C) It is preferred at low temperatures.

Note: The two characteristics of Chemisorption are: a) In chemically specified Chemisorption, adsorbate and adsorbent are bonded with chemical bonds that can be covalent or naturally ionic. b) High opening power is required and high temperature is desirable.