Question

Oxidation number of cobalt in $K\lbrack Co(CO)_{4}\rbrack$ is.

• A.
  • 1
• B.
  • 3
• C. – 1
• D. – 3

Answer 1

Answer: (C)

– 1

Answer 2

$K\lbrack\overset{*}{C} ⥂ o(CO)_{4}\rbrack$

$1 + x + 0 = 0;x = - 1$.