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Q.

A catalyst in a chemical reaction does not change

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a

Activation energy of the reaction

b

Average energy of reactants or products

c

Enthalpy of the reaction

d

Both 1 and 2

answer is D.

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Detailed Solution

Catalysts increase the reaction rate by reducing the activation energy or changing the reaction mechanism. It just increases the speed of reaction without taking part in it that's why the properties of the catalyst remain unchanged.

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