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

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The concentration of reactant molecules at the active centers of the catalyst becomes high due to adsorption

Adsorption lowers the activation energy of the reaction

In the process of adsorption, the activation energy of the molecules becomes large

Adsorption produces heat which increases the speed of the reaction

answer is B.

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Detailed Solution

Catalyst participates in a chemical reaction by forming temporary bonds with the reactants resulting in an intermediate complex.
It is believed that the catalyst provides an alternate pathway or reaction mechanism by reducing the activation energy between reactants and products .

Hence, option B is the correct answer.

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