Assertion :A catalyst speeds up a reaction but does not participate in its mechanism. Reason: A catalyst provides an alternative path of lower activation energy to the reactants.

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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Assertion is incorrect but Reason is correct

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Solution

The correct option is D Assertion is incorrect but Reason is correct
A catalyst speeds up a reaction. It may participate in its mechanism. It combines with one or more reactant molecules to form an intermediate and is regenerated at the end of the reaction.

A catalyst provides an alternative path of lower activation energy to the reactants.

Thus, the activation energy of the catalyzed reaction is lower than the activation energy of the uncatalyzed reaction.

Hence, the assertion is incorrect but the reason 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) 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.

Q. Assertion :A catalyst speeds up a reaction but doesn't participate in its mechanism. Reason: A catalyst provides an alternative path of lower activation energy to the reactants.

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) Order of the reaction can be zero or fractional.

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

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