Question

Regarding criteria of catalysis which one of the
following statements is not true ?
(a) The catalyst is unchanged chemically at the
end of the reaction
(b) A small quantity of catalyst is often
sufficient to bring about a considerable
amount of reaction
(c) In a reversible reaction the catalyst alters
the equilibrium position
(d) The catalyst accelerates the reaction.

Answer 1

Answer:

(a) The catalyst is unchanged chemically at the end of the reaction

Answer 2

(b) A small quantity of catalyst is often sufficient to bring about a considerable amount of reaction

Explanation:

(a) The catalyst is unchanged chemically at the end of the reaction - True.

(b) A small quantity of catalyst is often sufficient to bring about a considerable amount of reaction -- Untrue.

(c) In a reversible reaction the catalyst alters the equilibrium position - True.

(d) The catalyst accelerates the reaction. - True.

Hence Option B is the answer.