Assertion :Positive catalyst decrease the energy of activation. Reason: Negative catalyst increase the energy of activation.

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 C Assertion is correct but Reason is incorrect.
Assertion: Positive catalyst retards the energy of activation. A positive catalyst increases the rate of reaction by lowering the energy of activation. Thus, in the presence of a positive catalyst, the greater fraction of the total molecule will posses lower energy of activation and collided successfully in a short period of time, thereby. increasing the rate of reaction.
Reason: Negative catalyst does not lowers or increase the energy of activation. A negative catalyst does not lower the energy of activation rather it combines with the reactant molecules, thus, decreasing the number of colliding reactant molecules. This decreases the effective collisions and hence, the rate of reaction.

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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.

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

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