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JEE Main levelSingle correct optionDifficulty 2 of 3sc074

Which statement about catalysts is INCORRECT?

AA catalyst is chemically unchanged at the end of the reaction
BA catalyst can make a reaction with $Δ G > 0$ proceed spontaneously
CA small quantity of catalyst can bring about a large change
DA catalyst does not alter the enthalpy change of the reaction

Answer: B

A catalyst only changes the pathway and

E_{a}

. It cannot alter

Δ G

and so cannot make a non-spontaneous reaction (

Δ G > 0

) spontaneous.

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