12. The efficiency of an enzyme in catalysing a reaction is due to its capacity

Question

12. The efficiency of an enzyme in catalysing a reaction is due to its capacity A. To from a strong enzyme-substrate complex B. To decrease the bond energies in the substrate molecule. C. To change the shape of the substrate molecule D. To lower the activation energy of the reaction. 13. A photochemical reaction is: A. Catalysed by light. B. Initiated by light. C. Accompanied with emission of light. D. Accompanied with absorption of light. 14. The relationship between equilibrium pressure of a gas and its amount adsorbed on the solid adsorbent at constant temperature is called A. Chemisorption. B. adsorption isobar. C. adsorption isotherm D. none of these.

Explanation / Answer

Ans. 12. d) To lower the activation energy of the reaction.

Ans 13. b) initiated by light

photochemical reactions are initiated by light. In presence of light, either homolytic or heterolytic cleavage occurs.

Ans 14 c) adsorption isotherm, At constant temperature, Graph between Kp and amount of gas adsorbed.

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