The half-life of decomposition of gaseous $CH_3CHO$ at initial pressure of $364\, mm$ and $182\, mm$ of $Hg$ were $440\, sec$ and $880\, sec$ respectively. The order of the reaction is

  • A

    $2$

  • B

    $1$

  • C

    $0$

  • D

    $1.5$

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