Question

Which of the following statements is true about a catalyst?

(a) A catalyst remains unchanged in mass at the end of the reaction

(b) The chemical composition of catalyst changes at the end of the reaction

(c) Catalyst initiates the reaction

(d) Catalyst changes the position of reaction equilibrium

The question was posed to me in an internship interview.

This intriguing question comes from Classification of Reactions in division Basic Concepts of Chemical Reaction Engineering

Answer 1

Right choice is (a) A catalyst remains unchanged in mass at the end of the reaction

The best I can explain: A catalyst remains unchanged in mass and chemical composition at the end of the reaction. Catalyst cannot initiate the reaction. Catalyst cannot change the position of equilibrium.