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A catalyst increases the rate of reaction by :

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decreasing the free energy change for reaction

decreasing the enthalpy change of reaction.

decreasing the activation energy for reaction

all of the above

answer is C.

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Detailed Solution

A catalyst increases the rate of reaction by decreasing the activation energy for reaction.

The catalyst provide the other path to the reaction to complete itself by lowering the activation energy. Less the value of activation energy, more of the reactants will be able to cross the barrier.

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