JEE Main · 2023 · 12 Apr 2023 · Shift 1 · Chemical Kinetics

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The reaction
takes places through the mechanism given below:
(fast)
(slow)

The overall order of the reaction is ______.

Answer: 3

Solution

The slow step fixes the rate: . Since is an intermediate formed in the fast pre-equilibrium, , hence . Substituting,

The order with respect to is two and with respect to is one, so the overall order of the reaction is 3.

JEE Main · 2023 · 12 Apr 2023 · Shift 1 · Integer answer

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