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Question

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

A

adsorption produces heat which increases the speed of the reaction

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B

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

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C

in the process of adsorption, the activation energy of the molecules become large

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D

adsorption lowers the activation energy of the raction

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Solution

The correct option is C adsorption lowers the activation energy of the raction
According to this theory, catalyst changes the value of activation energy which can be crossed by the reactants easily and consequently products are formed and speed of the reaction increases.

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