Question

In a two step process
(I) $A \to B$
(II) $B \to C$

Which step is rate determining?

• A. I
• B. II
• C. I & II
• D. None of these

Answer 1

Answer: (A)

In the potential energy profile, the rate-determining step is the reaction step with the highest energy of transition state. The rate-determining step is the first reaction as the $E_{a}$ for reaction $(I)$ is high.