Question

Which is not true in the case of a catalyst?

Options

• The catalyst is unchanged chemically at the end of a reaction.

• The catalyst accelerates a reaction.

• In a reversible reaction, the catalyst alters the equilibrium position.

• A small amount of catalyst is often sufficient to bring about a large change in reaction.

Answer 1

In a reversible reaction, the catalyst alters the equilibrium position.

Explanation:

A catalyst speeds up both the forward and reverse reactions equally; thus, it does not change the equilibrium position; it only helps the system reach equilibrium faster. Other statements about catalysts are true: they are chemically unchanged at the end, they accelerate reactions, and even a small amount can cause a large change in the reaction rate.