NEET2003ChemistrySurface ChemistryActual
According to the adsorption theory of catalysis, the speed of the reaction increases because
Options
- Athe concentration of reactant molecules at the active centres of the catalyst becomes high due to adsorption
- Bin the process of adsorption, the activation energy of the molecules becomes large
- Cadsorption produces heat which increases the speed of the reaction
- Dadsorption lower the activation energy of the reaction
Correct answer
D. adsorption lower the activation energy of the reaction
Step-by-step solution
According to the adsorption theory of catalysis, the reactants in their gaseous state or in their dissolved state in any solution get adsorbed on the surface of a suitable catalyst in its solid state. As a result of the increase in the concentration of the reactants on the surface of the catalyst, availability, and probability of the occurrence of a reaction between two species increases, and thus the rate of the reaction increases.