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Q.

The oxidation state of ‘Cr’ in Cr(CO)6 is

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a

0

b

+2

c

+4

d

+6

answer is A.

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Detailed Solution

In metal carbonyls, the oxidation number of metal is zero because, the ligand CO acts as neutral.  Therefore the oxidation state of ‘Cr’ in Cr(CO)6 is 0.
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