In dodecacarbonyl dicobalt, the oxidation state of cobalt is:

1

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2

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3

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Zero

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Solution

The correct option is D Zero
$[C O_{2} (C O)_{10}]$
$2 x + 10 (0) = 0$
$\Rightarrow 2 x = 0$
$\Rightarrow x = 0$

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