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Which of the following is a true statement about the role of catalysts in a reaction?
I. Catalysts more effectively lowers the activation energy in the forward direction.
II. Catalysts generally react with one or more reactants to form intermediates that subsequently give the final reaction product..
III. If a catalyst affects the equilibrium of the reaction, it must be consumed as the reaction proceeds.
IV. Catalysts can may increase the reaction rate or selectivity or enable the reaction at a lower temperature.
I. Catalysts more effectively lowers the activation energy in the forward direction.
II. Catalysts generally react with one or more reactants to form intermediates that subsequently give the final reaction product..
III. If a catalyst affects the equilibrium of the reaction, it must be consumed as the reaction proceeds.
IV. Catalysts can may increase the reaction rate or selectivity or enable the reaction at a lower temperature.
- a)II, III, and IV
- b)II and IV
- c)I and III
- d)II and III
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Which of the following is a true statement about the role of catalysts...
Analyze each statement and eliminate any answer choices as we move along.
Catalysts more effectively lowers the activation energy in the forward reaction is an incorrect statement. If we look at any energy profile, it will become apparent that by lowering the activation energy of the forward reaction that of the reverse reaction is also lowered.
Catalysts generally react with one or more reactants to form intermediates that subsequently given the final reaction product is a true statement. What needs further qualification is the process of giving the final reaction product. In that process, what is regenerated is the catalyst. A catalyst may react with the reactants as long as it is regenerated by the reaction.
If a catalyst affects the equilibrium of the reaction, it must be consumed as the reaction proceeds is an incorrect statement. Catalysts can only affect the kinetics or the rate at which the reaction approaches equilibrium, but not the equilibrium constant of the reaction. Concentration, pressure, temperature can affect the equilibrium, but not a catalyst.
Catalysts may increase the reaction rate or selectivity or enable the reaction at a lower temperature. Lowering the activation energy would allow for the reaction to occur at a lower temperature since less heat is needed to overcome the barrier. Statement IV is correct.
Statements II and IV are correct.
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Which of the following is a true statement about the role of catalysts in a reaction?I. Catalysts more effectively lowers the activation energy in the forward direction.II. Catalysts generally react with one or more reactants to form intermediates that subsequently give the final reaction product..III. If a catalyst affects the equilibrium of the reaction, it must be consumed as the reaction proceeds.IV. Catalysts can may increase the reaction rate or selectivity or enable the reaction at a lower temperature.a)II, III, and IVb)II and IVc)I and IIId)II and IIICorrect answer is option 'B'. Can you explain this answer? for MCAT 2025 is part of MCAT preparation. The Question and answers have been prepared according to the MCAT exam syllabus. Information about Which of the following is a true statement about the role of catalysts in a reaction?I. Catalysts more effectively lowers the activation energy in the forward direction.II. Catalysts generally react with one or more reactants to form intermediates that subsequently give the final reaction product..III. If a catalyst affects the equilibrium of the reaction, it must be consumed as the reaction proceeds.IV. Catalysts can may increase the reaction rate or selectivity or enable the reaction at a lower temperature.a)II, III, and IVb)II and IVc)I and IIId)II and IIICorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for MCAT 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is a true statement about the role of catalysts in a reaction?I. Catalysts more effectively lowers the activation energy in the forward direction.II. Catalysts generally react with one or more reactants to form intermediates that subsequently give the final reaction product..III. If a catalyst affects the equilibrium of the reaction, it must be consumed as the reaction proceeds.IV. Catalysts can may increase the reaction rate or selectivity or enable the reaction at a lower temperature.a)II, III, and IVb)II and IVc)I and IIId)II and IIICorrect answer is option 'B'. Can you explain this answer?.
Which of the following is a true statement about the role of catalysts in a reaction?I. Catalysts more effectively lowers the activation energy in the forward direction.II. Catalysts generally react with one or more reactants to form intermediates that subsequently give the final reaction product..III. If a catalyst affects the equilibrium of the reaction, it must be consumed as the reaction proceeds.IV. Catalysts can may increase the reaction rate or selectivity or enable the reaction at a lower temperature.a)II, III, and IVb)II and IVc)I and IIId)II and IIICorrect answer is option 'B'. Can you explain this answer? for MCAT 2025 is part of MCAT preparation. The Question and answers have been prepared according to the MCAT exam syllabus. Information about Which of the following is a true statement about the role of catalysts in a reaction?I. Catalysts more effectively lowers the activation energy in the forward direction.II. Catalysts generally react with one or more reactants to form intermediates that subsequently give the final reaction product..III. If a catalyst affects the equilibrium of the reaction, it must be consumed as the reaction proceeds.IV. Catalysts can may increase the reaction rate or selectivity or enable the reaction at a lower temperature.a)II, III, and IVb)II and IVc)I and IIId)II and IIICorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for MCAT 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is a true statement about the role of catalysts in a reaction?I. Catalysts more effectively lowers the activation energy in the forward direction.II. Catalysts generally react with one or more reactants to form intermediates that subsequently give the final reaction product..III. If a catalyst affects the equilibrium of the reaction, it must be consumed as the reaction proceeds.IV. Catalysts can may increase the reaction rate or selectivity or enable the reaction at a lower temperature.a)II, III, and IVb)II and IVc)I and IIId)II and IIICorrect answer is option 'B'. Can you explain this answer?.
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