Question

Which of the following is never true for the rate law of an elementary reaction step?

• A. The rate law for the individual step is always directly related to the number of colliding reactant particles.
• B. A catalyst applied to an individual step will always speed up the rate for the overall reaction.
• C. The elementary steps always add to give the total net overall reaction.
• D. The balanced chemical equation can not be used to determine the overall rate order for the reaction.

Answer 1

Answer: (B)

A catalyst applied to an individual step will always speed up the rate for the overall reaction.

A catalyst applied to the slowest step only will speed up the rate of the overall reaction. But if a catalyst is applied to any individual step will not speed up the rate of the overall reaction.

Therefore, (B) is the correct answer