Assertion :The activation energy for an uncatalysed reaction is less than for a catalysed reaction Reason: Negative catalyst increases the activation energy

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 D Both Assertion and Reason are incorrect
The catalyst is a species which increases the rate of the reaction by decreasing the activation energy.
Thus, the catalyzed reaction have lower activation energy than uncatalyzed reaction.
Also, negative catalyst or inhibitor decreases the rate of reaction by reacting with the reactant molecule and decreasing there amount. But it does not affect activation energy.
Thus. both assertion and reason are incorrect.

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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.

Q. Assertion
If BOD level of water in reservoir is less than 5 ppm it is not polluted.

Reason
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and

H e

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

Reason: The compressibility factor for

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ASSERTION: n-Pentane and n-Hexane belong to a homologous series.

REASON: n-Pentane and n-Hexane belong to the same class of hydrocarbons and they differ by a - $C H_{2}$ - group.

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