AIIMS2008Chemistry-Chemical Kinetics
AIIMS 2008 Chemistry Rate Laws MCQ Question
Type: MCQ-numerical-Medium-Class 12
For the reaction, 2NO₂ + F₂ → 2NO₂F, following mechanism has been provided. NO₂ + F₂ → Slow → NO₂F + F NO₂ + F → Fast → NO₂F Thus, rate expression of the above reaction can be written as
A
r = k [NO₂]₂[F₂]
B
r = k [NO₂][F₂]
C
r = k [NO₂]
D
r = k [F₂]
Correct Answer
Option B
Detailed Explanation
Slowest step of mechanism decides the rate expression.
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