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CGP EDU Academic Team
Published on: August 14, 2026
The reaction of NO2 (g) and O3 (g) is first-order in NO2 (g) and O3 (g)
2 NO2 (g) + O3 (g) 
N2O5 (g) + O2 (g)
The reaction can take place by mechanism :
I : NO2 + O3 
NO3 + O2
NO3 + NO2 
N2O5
II : O3 
O2 + [O]
NO2 + O 
NO3
NO3 + NO2 
N2O5
Select correct mechanism.
Text Solution
Verified by ExpertsThe correct answer is:
C
For Rxn rate determining step is slowest step
Then in 1st Rxn
.....(i)
But 2nd Rxn
O3 
O2 + [O]....
NO2 + O 
NO3 ....
NO3 + NO2 
N2O5 ....
Then for Rxn
....
by Rxn
....(ii)
put value of [O] from to (ii)
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