MCQ
Which metal has the highest melting point in the first transition series?
- AMn
- ✓Cr
- CFe
- DCu
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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 $.....$.

(The atomic mass of $Na$ is $23\, g / mol$ ) :