What is the role of adsorption in heterogeneous catalysis?

 
NEETprep Answer: 
 
Catalyst is used to increase rate of reaction.Heterogeneous catalyst is used to increase rate of reaction in which catalyst Is not in phase with reactants and products. Role of adsorption in heterogeneous catalysis are

(i) Diffusion of reactants to the surface ofthe catalyst.

(ii) Reactants are adsorbed on the catalyst surface.

(iii) Occurrence of chemical reaction at catalyst surface.

(iv) Desorption.

(v) Diffusion of reaction products away from the catalysts surface.