For the reaction $2P + Q \to R$. If the rate of appearance of $R$ is $0.5 \ mol \ L^{-1} \ h^{-1}$,then the rate of disappearance of $P$ and $Q$ are:

  • A
    $0.5 \ mol \ L^{-1} \ h^{-1}$ and $0.25 \ mol \ L^{-1} \ h^{-1}$
  • B
    $0.5 \ mol \ L^{-1} \ h^{-1}$ and $0.5 \ mol \ L^{-1} \ h^{-1}$
  • C
    $1 \ mol \ L^{-1} \ h^{-1}$ and $0.5 \ mol \ L^{-1} \ h^{-1}$
  • D
    $0.25 \ mol \ L^{-1} \ h^{-1}$ and $1 \ mol \ L^{-1} \ h^{-1}$

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