1.

A two-step mechanism has been suggested for the reaction of nitric oxide and bromine NO(g)+br_(2)(g) overset(k_(1))(to)NOBr_(2)(g) NOBr_(2)(g)+NO(g)overset(k_(2))(to)2NOBr(g) Observed rate law is, rate =k[NO]^(2)[Br_(2)] : Hence, rate determining step is

Answer»

`NO(g)+Br_(2)(g) to NOBr_(2)(g)`<BR>`NOBr_(2)(g)+NO(g) to 2NOBr(g)`
`2NO(g)+Br_(2)(g) to 2NOBr(g)`
NONE of these

ANSWER :B


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