MHT CET Chemistry question

Not in JEE Main or NEET syllabus

According to the adsorption theory of catalysis, the speed of the reaction increases because [AIIMS 2007]

(A)Adsorption produces heat which increases the speed of the reaction
(B)Adsorption lowers the activation energy of the reactionCorrect
(C)The concentration of reactant molecules at the active centres of the catalyst becomes high due to adsorption
(D)In the process of adsorption, the activation energy of the molecules becomes large

Answer: (B)

Solution

On adsorption the reactants take a new path on the catalyst surface with a lower activation energy, which raises the rate (b);

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Question ID VK-069113