According to the adsorption theory of catalysis the speed of the reaction increases because

Options

A. the heat liberated during adsorption increases the rate of reaction
B. the kinetic energy of reactants increases which increases the rate of reaction
C. the activation energy of reaction increases which increase the rate of reaction
D. The concentration of reactants at the active centres becomes high due to adsorption resulting in increase in the rate of reaction.

Answer

D