Question

Oxidation number of cobalt in K[Co(CO)₄] is

Options

• +1

• +3

• – 1

• – 3

Answer 1

– 1

Explanation:

K[Co(CO)₄]

Let O.N. of Co be x then

\[\ce{\underset{for K}{1 × (+1)} + \underset{for Co}{x} + \underset{for CO}{4} × (0) = 0}\]

∴ O.N. of Co is = – 1