Assertion :A positive catalyst increases the rate of a reaction. Reason: In presence of a catalyst, the activation energy of the reaction increases.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Both Assertion and Reason are incorrect.

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Solution

The correct option is C Assertion is correct but Reason is incorrect.
A positive catalyst increases the rate of a reaction by decreasing the activation energy of a reaction.

Hence option $C$ is correct.

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Similar questions

Assertion (A) The enthalpy of reaction remains constant in the presence of a catalyst.

Reason (R) A catalyst participating in the reaction forms different activated complex and lowers down the activation energy but the difference in enrgy of reactant and product remains the same.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

Assertion (A) Order of the reaction can be zero or fractional.

Reason (R) We cannot determine order from balanced chemical equation.

Assertion (A) Order and molecularity are same.

Reason (R) Order is determined experimentally and molecularity is the sum of the stoichimetric coeffcient of rate determining elementary step.

Q. Assertion: The compressibility factor for

H_{2}

and

H e

(1 + \frac{P b}{R T})

Reason: The compressibility factor for

H_{2}

and

H e

can be derived from Van der Waal's equation.

Assertion (A) All collision of reactant molecules lead to product formation.

Reason (R) Only those collisions in which molecules have correct orientation and sufficient kinetic energy lead to compound formation.

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Assertion :A positive catalyst increases the rate of a reaction. Reason: In presence of a catalyst, the activation energy of the reaction increases.

The correct option is C Assertion is correct but Reason is incorrect.A positive catalyst increases the rate of a reaction by decreasing the activation energy of a reaction.Hence option C is correct.

The correct option is C Assertion is correct but Reason is incorrect.
A positive catalyst increases the rate of a reaction by decreasing the activation energy of a reaction.

Hence option $C$ is correct.