A catalyst is consumed in a reaction. a. A. Enzymes are mostly proteinous in nature. a) The surface of the solid catalyst possess some isolated active centres having residual affinity b) Due to these centres, the molecules of the gaseous reactants get adsorbed in unimolecular thick layer c) The adsorbed reactants get activated and then react The presence of a catalyst speeds up a reaction: The presence of a catalyst changes the rate of a reaction: In some reactions, one of the products acts as a catalyst for the forward reaction: During use, a catalyst may be poisoned: A catalyst catalyses a spontaneous chemical reaction. c. A catalyst allows a system to reach equilibrium more rapidly. A catalyst catalyses all chemical reaction, whether spontaneous or non-spontaneous. Which of the following statements about "catalysts" is INCORRECT? B. Enzymes are least reactive at optimum temperature. C. Enzymes are denaturated by ultraviolet rays and at high temperature. B) Catalysts are formed in one step of a reaction mechanism and consumed in another. Which of the following statements concerning the effect of temperature change on an enzyme-catalyzed reaction is incorrect? C. A catalyst provides alternate path of chemical reaction. Which of the statements is INCORRECT about the following reaction? When a catalyst is added to a system the. Select the incorrect statement about the adsorption theory from the following option. An increase in temperature can increase the reaction rate by increasing the speed at which molecules move. Which of the following statements is incorrect about catalysts in hydrogenation reactions? D) Catalysts usually change the … Which statement is incorrect for a catalyst? D. reduce the energy of activation and increase the rate of a reaction. How can one increase the rate of a chemical reaction? b. Which of the following statements is incorrect about catalyst? View solution. View solution. a. Which one of the following statements is incorrect in the case of heterogeneous catalysis ? An increase in temperature can stop the reaction by denaturing the enzyme. Which statement about a catalyst is incorrect? A) Catalysts affect the reaction rate, but do not appear in the rate law since their concentration does not change. -A catalyst alters the rate of a chemical reaction.-A catalyst does not change the energy of the reactants or the products.-A catalyst can be used to speed up slow reactions.-A catalyst can be consumed in a reaction as long as it is regenerated. A catalyst provides a route between reactants and products. D. ... A biological catalyst … Phosphoenolpyruvate+ADP -> Pyruvate + ATP. Which one of the following statement is incorrect about enzyme catalysis? d. A catalyst speeds up the rate of a reaction. B. (A) It does not affect the equilibrium constant (B) It increases the proportion of products in less time (C) It decreases the activation energy of a reaction (D) It increases the free energy change for the reaction Regarding criteria of catalysis which one of the following statements is not true. Which of the following statements concerning catalysts is incorrect? b. A catalyst is a substance that slows down a chemical reaction without being consumed in the process. A. The primary function of an enzyme or any biological catalyst is to. c. D. A catalyst does not involve in a chemical reaction. Which of the following statement is incorrect? It's anabolic. C) Catalysts lower the activation energy for the reaction. (a) The catalyst lowers the energy of activation (b) The catalyst actually forms a compound with the reactant (c) The surface of the catalyst plays a very important role (d) There is no change in the energy of activation. answer choices . Correct answers: 3 question: Incorrect statement about a catalyst is It generally increases the activation energy for the forward and reverse reactionIt does not appear in the balanced chemical equationIt increases the rate of the chemical reactionIt does not change the value of equilibrium constant of reaction 5. ... A catalyst provides proper orientation for the reactant molecules to react.