The oxidation number of cobalt in K[Co(CO)₄] is
(i) + 1 (ii) + 3 (iii) –1 (iv) –3

Question

The oxidation number of cobalt in K[Co(CO) 4 ] is (i) + 1 (ii) + 3 (iii) –1 (iv) –3

Philoid · Accepted Answer

K[Co(CO)₄] = K ⁺ + [Co(CO)₄]^-

total overall charge as 0:

X + 4(0) = -1

X = -1.

Option (iii) is correct.

The oxidation number of cobalt in K[Co(CO)4] is(i) + 1 (ii) + 3 (iii) –1 (iv) –3