MCQ
Nitrobenzene on further excessive nitration gives
- ATrinitrobenzene
- ✓$m-$dinitrobenzene
- C$p-$dinitrobenzene
- DAll of these

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takes places through the mechanism given below :
$NO + Br _2 \Leftrightarrow NOBr _2 \text { (fast) }$
$NOBr _2+ NO \rightarrow 2 NOBr \text { (slow) }$
The overall order of the reaction is $.....$.