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  4. In a two step process (I) A → B (II) B → C <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/chemistry/e703b1dfc9e41b46dbb205cd3b4120ed-.png /> Which step is rate determining?

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Q. In a two step process
(I) $A \to B$
(II) $B \to C $
image
Which step is rate determining?

Chemical Kinetics

Solution:

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.