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  • Which of the following statement is not correct for the catalyst? (i) It catalyses the forward and backward reaction to the same extent. (ii) It alters \Delta G of the reaction.

Which of the following statement is not correct for the catalyst?

(i) It catalyses the forward and backward reaction to the same extent.

(ii) It alters \Delta G of the reaction.

(iii) It is a substance that does not change the equilibrium constant of a reaction.

(iv) It provides an alternate mechanism by reducing activation energy between reactants and products.

Answers (1)

The answer is the option (ii)

A catalyst increases the rate of both the forward and backward reaction to the same extent. Hence, option a is correct.

\Delta G= \text {-RT ln Q where Q is the reaction quotient}

Reaction quotient is the relation between the concentration of reactants and products. Thus the gibbs free energy is unaffected by the addition of catalyst. It does not affect the equilibrium of the reaction since equilibrium constant depends only on the concentration of reactants and products.

 

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