Oxidation number of cobalt in \[K[Co{{(CO)}_{4}}]\] is [KCET 1996]

1.	Oxidation number of cobalt in \[K[Co{{(CO)}_{4}}]\] is [KCET 1996]
A.	+ 1
B.	3
C.	-1
D.	-3
Answer» D. -3

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Oxidation number of cobalt in \[K[Co{{(CO)}_{4}}]\] is [KCET 1996]

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