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Question: Answered & Verified by Expert
9.30 The oxidation number of cobalt in \(\mathrm{K}\left[\mathrm{Co}(\mathrm{CO})_4 \mid\right.\) is
(i) \(+1\)
(ii) \(+3\)
(iii) \(-1\)
(iv) \(-3\)
ChemistryCoordination Compounds
Solution:
2234 Upvotes Verified Answer
\(\mathrm{K}\left[\mathrm{Co}(\mathrm{CO})_4\right]=\mathrm{K}^{+}\left[\mathrm{Co}(\mathrm{CO})_4\right]^{-}\)
\(\begin{gathered}
\quad x+0=-1 \\
x=-1
\end{gathered}\)
Hence, (iii) is the correct option.

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