Which of the following statements regarding catalyst is not true? A catalyst remains unchanged in composition and quantity at the end of the reaction. A catalyst can alter the Gibbs free energy change. A catalyst does not alter the equilibrium in a reversible reaction. Catalysts are sometimes very specific in respect of reaction.

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Omari Lane · Accepted Answer

(i)It does not catalyze involuntary reactions; only spontaneous ones.(ii) It only helps in reaching equilibrium more quickly and does not alter the equilibrium constant.(iii) In the event of a reversible reaction, it equally catalyzes both forward and backward reactions to maintain the equilibrium state.(iv) It has no effect on a reaction&#039;s Gibbs energy.(v)A large number of reactants can be catalyzed by a small amount of the catalyst. So, answer is A catalyst can alter the Gibbs free energy change.

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