Consider the following reaction that goes from A to B in three steps as shown below:-
Choose the correct
(A)Number of intermediates: 3, Number of Activated complexes: 2, Rate determining step: II
(B)Number of intermediates: 2, Number of Activated complexes: 3, Rate determining step: II✓ Correct
(C)Number of intermediates: 2, Number of Activated complexes: 3, Rate determining step: I
(D)Number of intermediates: 2, Number of Activated complexes: 3, Rate determining step: III
Answer: (B)
Solution
From the energy profile diagram: there are 3 peaks (activated complexes) and 2 valleys between A and B (intermediates P and Q). The rate-determining step (RDS) is the one with the highest activation energy, which is step II. Therefore: Number of intermediates = 2, Number of activated complexes = 3, RDS = step II.
JEE Main · 2023 · 06 Apr 2023 · Shift 2 · Single correct option
