Which statement about a catalyst is INCORRECT?
- A. It remains chemically unchanged at the end of the reaction
- B. It is needed only in a small amount
- C. It shifts the equilibrium towards the products
- D. It lowers the activation energy of both the forward and reverse reactions
Explanation
Because a catalyst lowers the barrier equally in both directions, the two rates rise by the same factor and the equilibrium position and the value of Kc are completely unaffected. What changes is how quickly equilibrium is reached. The other three statements are all true, and the small quantity needed follows from the catalyst being regenerated in each cycle.
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