A two-step mechanism has been suggested for the reaction of nitric oxide and bromine:NO(g)+Br2(g)k1−→NOBr2(g) NOBr2(g)+NO(g)k2−→2NOBr(g) Observed rate law is, rate = k[NO]2[Br2] : Hence, rate determining step is
A
NO(g)+Br2(g)→NOBr2(g)
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B
NOBr2(g)+NO(g)→2NOBr(g)
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C
2NO(g)+Br2(g)→2NOBr(g)
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D
Noneofthese
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Solution
The correct option is BNOBr2(g)+NO(g)→2NOBr(g) Second step will be the rate determining step