The possible mechanism for the reaction

$2NO + Br \to 2NOBr$ is

$NO + Br_2 \rightleftharpoons NOBr_2$ (Fast)

$NOBr_2 + NO \to 2NOBr$ (Slow)

The rate law expression is

  • A

    $r = K\, [NO][Br_2]$

  • B

    $r = K\, [NO][NOBr_2]^2$

  • C

    $r = K\, [NO]^2[Br_2]$

  • D

    $r = K \,[NOBr_2][NO]^2[Br_2]$

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