Q.

Consider the following reactions, 
O3O2+O           (fast        .....(i)O+O32O2        (slow)      .......(ii) 
The rate law expression should be

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a

r=kO32O21

b

r=kO3O2

c

r=kO32

d

r=kO21

answer is A.

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Detailed Solution

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From Eq. (i) Keq =O2[O]O3
or                [O]=KeqO3O2
From Eq.(ii)  rate law =kO3[O]
or                            r=kO3O3O2Keq
or                          r=kO32O21k=k×Keq

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