Q27 / 90 · JEE Main 2023 (11 Apr Shift 2) · Chemistry
The number of correct statements about modern adsorption theory of heterogeneous catalysis from the following is ......
A. The catalyst is diffused over the surface of reactants.
B. Reactants are adsorbed on the surface of the catalyst.
C. Occurrence of chemical reaction on the catalyst's surface through formation of an intermediate.
D. It is a combination of intermediate compound formation theory and the old adsorption theory.
E. It explains the action of the catalyst as well as those of catalytic promoters and poisons.
The number of correct statements about modern adsorption theory of heterogeneous catalysis from the following is ......
A. The catalyst is diffused over the surface of reactants.
B. Reactants are adsorbed on the surface of the catalyst.
C. Occurrence of chemical reaction on the catalyst's surface through formation of an intermediate.
D. It is a combination of intermediate compound formation theory and the old adsorption theory.
E. It explains the action of the catalyst as well as those of catalytic promoters and poisons.
Correct answer: 3
Solution
Adsorption theory of Heterogeneous catalysis involves five steps-
- Diffusion of reactants to the surface of the catalyst.
- Adsorption of reactant molecules on the surface of the catalyst. (Occurrence of chemical reaction on the catalyst’s surface through formation of an intermediate.
- Desorption of reaction products from the catalyst surface
- Making the surface available again for more reaction to occur.
- Diffusion of reaction products away from the catalyst’s surface.
Hence, the correct answer is 3.