The oxidation states of Cr in $[C r (H_{2} O)_{6} C l_{3}], [C r (C_{6} H_{6})_{2}]$ and $K_{2} [C r (C N)_{2} (O)_{2} (O_{2}) (N H_{3})]$ respectively are:

+3, 0, +4

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+3, +4, +6

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+3, +2, +4

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+3, 0, +6

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Solution

The correct option is D +3, 0, +6

Compounds Oxidation number of Cr

$[C r (H_{2} O)_{6} C l_{3}]$ +3

$[C r (C_{6} H_{6})_{2}]$ 0

$K_{2} [C r (C N)_{2} (O)_{2} (O_{2}) (N H_{3})]$ +6

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