Question

Which of the following is not true about a catalyst?

• A. Mechanism of the reaction in presence and absence of catalyst could be different
• B. Enthalpy of the reaction does not change with catalysts
• C. Catalyst enhances both forward and backward reaction at equal rate
• D. Catalyst participates in the reaction, but not consumed in the process
• E. Use of catalyst cannot change the order of the reaction

Answer 1

Answer: (E)

The catalyst

(i) If not present may give a different product.

(ii) Will not change the net enthalpy of the reaction.

(iii) Can enhances both forwards and backward reactions.

(iv) Will participates in the reaction but not get consumed.

(v) Use of a catalyst may change the order.