In a reaction the ferrous $(F{e^{ + 2 }})$ iron is oxidised to ferric $(F{e^{ + 3 }})$ ion. The equivalent weight of the ion in the above reaction is equal to

  • A

    Half of the atomic weight

  • B

    $1/5$ of the atomic weight

  • C

    The atomic weight

  • D

    Twice the atomic weight

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