Q. 304.5( 14 Votes )

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

(i) + 1 (ii) + 3 (iii) –1 (iv) –3

Answer :

K[Co(CO)4] = K + + [Co(CO)4]-

total overall charge as 0:

X + 4(0) = -1

X = -1.

Option (iii) is correct.

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