Which of the following is an oxidizing agent?

M n (C O)_{5}

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F e (C O)_{5}

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M n_{2} (C O)_{12}

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F e_{2} (C O)_{9}

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Solution

The correct option is B $M n (C O)_{5}$
$M n (C O)_{5}$ acts as an oxidizing agent. it accepts an electron to form $[M n (C O)_{5}]^{-}$ which acquires EAN of 36 (electronic configuration of Kr) and is stable.
$M n (C O_{5}) less stable (O . A .) + ¯ ¯ ¯ e \to [M n (C O)_{5}]^{-} more stable, as EAN of Mn=36(Kr)$

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