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Q.

Select correct statement(s) about role of catalyst for a reaction

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a

A catalyst does not after Gibbs energy ∆G°

b

Energy of activation is lowered

c

Enthalpy of a reaction is lowered

d

it catalyses the spontaneous reaction but does not catalyse the non-spontaneous reaction

answer is A.

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Detailed Solution

(1) ΔG∘=−2.303 RT log⁡KcSince, Kc remains unchanged in the presence of a catalyst, thus ∆G° is not affected correct.(2) In the presence of catalyst, reaction path of lower activation energy is taken Correct(3) In the presence of catalyst, reaction path of lower activation energy is taken Correct.(4) Nor spontaneous reactions are not catalysed. correct.
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