A catalyst is a substance which [NCERT 1981; CPMT 1996

Alters the equilibrium in a reaction

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Is always in the same phase as the reactants

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Participates in the reaction and provides easier pathway for the same

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Does not participate in the reaction but speeds it up

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Solution

The correct option is D
Does not participate in the reaction but speeds it up

A catalyst does not take part in the reaction but can speed it up. It can be recovered after the reaction.

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