Question

Select the correct option from the following option.

(a) Catalyst is used to increase the rate of reaction by altering chemically during the course of reaction

(b) Catalyst is used to decrease the rate of reaction by altering chemically during the course of reaction

(c) Catalyst is used to increase the rate of reaction and remains unaltered chemically during the course of reaction

(d) Catalyst is used to decrease the rate of reaction and remains altered chemically during the course of reaction

The question was posed to me in exam.

The doubt is from Molecularity of a Reaction in division Reaction Dynamics of Engineering Chemistry I

Answer 1

Correct option is (c) Catalyst is used to increase the rate of reaction and remains unaltered chemically during the course of reaction

For explanation: Catalyst is used to increase the rate of reaction and remains unaltered chemically during the course of the reaction. With a catalyst, reactions occur faster and require less activation energy. Because catalysts are not consumed in the catalyzed reaction, they can continue to catalyze the reaction of further quantities of reactant.