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The reaction, 2NO+Br(2)rarr 2NOBr, is su...

The reaction, `2NO+Br_(2)rarr 2NOBr`, is supposed to follow the following mechanism,
(i) `NO+Br_(2) overset("fast")(hArr) NOBr_(2)`
(ii) `NOBr_(2) +NO overset(slow)(rarr)2NOBr`
suggest the rate law expression.

A

`r=k[NO]^(2)[Br_(2)]`

B

`r=k[NO][Br_(2)]`

C

`r=k[NO][Br_(2)]^(2)`

D

`r=k[NOBr_(2)]`

Text Solution

Verified by Experts

The correct Answer is:
A
(a) For slowet step : rate
`=k[NO][Br_(2)]" "...(i)`For equilibrium,
`k=([NOBr_(2)])/([NO][Br_(2)])" "...(ii)`by(i) and(ii),
`r=k dot"K_(c)[NO]^(2) [Br_(2)]`
rate
`=k[NO]^(2)[Br_(2)]`
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