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  4. Oxidation state of cobalt in Na [ Co ( CO )4] is

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Q. Oxidation state of cobalt in $Na \left[ Co ( CO )_{4}\right]$ is

Coordination Compounds

Solution:

$Na \left[ Co ( CO )_{4}\right]: 1+ x +4 \times 0, \Rightarrow \,\,\,x =-1$