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Which one of the following statements is not correct?

1. The value of equilibrium constant is changed in the presence of a catalyst in the reaction at equilibrium
2. Enzymes catalyse mainly bio-chemical reactions
3. Coenzymes increase the catalytic activity of enzyme
4. Catalyst does not initiate any reaction

Correct answer: The value of equilibrium constant is changed in the presence of a catalyst in the reaction at equilibrium

Solution

A catalyst does not change the equilibrium constant; it only speeds up the attainment of equilibrium by lowering the activation energy. Thus, statement A is incorrect.

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