17. Which of the following statements is always true? A. Exothermic reactions ha

Question

17. Which of the following statements is always true?
A. Exothermic reactions have lower activation energies than endothermic reactions. B. The rate of a catalyzed reaction is independent of the concentration of the catalyst. C. The rate for a reaction depends on the concentrations of all the reactants.
D. The rate constant is independent of the concentrations of the reacting species.
E. The rate law can be determined from the stoichiometric equation.

18. Which of the following statements is incorrect?
A. The rates of most chemical reactions change with time.
B. The rate constant for a reaction can be changed by changing the temperature.
C. The rate constant is dependent on the reactant concentrations.
D. In a series of stepwise reactions, the rate-determining step is the slowest one.
E. The rate of a catalyzed reaction is dependent on the concentration of the catalyst.

Explanation / Answer

17. Which of the following statements is always true?

B. The rate of a catalyzed reaction is independent of the concentration of the catalyst.

18. Which of the following statements is incorrect?

D. In a series of stepwise reactions, the rate-determining step is the slowest one.

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.