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Standard XII

Chemistry

Types of Catalysis

Assertion :Po...

Question

Assertion :Positive catalysts increase the rate of reaction. Reason: Catalysts decrease the value of $Δ G^{o}$ .

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
Positive catalysts do increase the rate of reaction. they do so by decreasing the value of activation energy, by providing an alternate path for the 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.

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: All the points (1, 0), (-1, 0), (2, 0) and (5, 0) lie on the x – axis.
Reason: Equation of the x-axis is y = 0

Choose the correct option.

Q. Assertion: The impurities such as

{SiO}_{2}

present in iron ore is removed by

{CaCO}_{3}

.

Reason:

CaO

formed by decomposition of

{CaCO}_{3}

reacts with

{SiO}_{2}

to form slag.

Assertion – The non-fusible impurities present in iron ore are removed by $C a C O_{3}$ .

Reason: $C a C O_{3}$ which decomposes into $C a O$ and $C O_{2}$ . The $C a O$ formed reacts with $S i O_{2}$ to remove silica

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Assertion :Positive catalysts increase the rate of reaction. Reason: Catalysts decrease the value of ΔGo.

The correct option is C Assertion is correct, but Reason is incorrectPositive catalysts do increase the rate of reaction. they do so by decreasing the value of activation energy, by providing an alternate path for the reaction.

Assertion :Positive catalysts increase the rate of reaction. Reason: Catalysts decrease the value of $Δ G^{o}$ .

The correct option is C Assertion is correct, but Reason is incorrect
Positive catalysts do increase the rate of reaction. they do so by decreasing the value of activation energy, by providing an alternate path for the reaction.