The mechanism of the reaction $A + 2B \to D$ is
$2B \xrightarrow{k} B_2$ $[Slow]$
$B_2 + A \to D$ $[Fast]$
The rate law expression,order with respect to $A$,order with respect to $B$ and overall order of reaction are respectively

  • A
    $k[B]^2, 0, 2, 2$
  • B
    $k[A]^1 [B]^2, 1, 2, 3$
  • C
    $k[A]^2, 0, 2, 2$
  • D
    $k[A]^2 [B]^1, 1, 2, 3$

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