MCQ
Select the correct $\text{IUPAC}$ name for $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{2+}$.
- AHexammoniacobaltate$(II)$ ion
- BHexaamminecobaltate$(II)$ ion
- CHexammoniacobalt$(II)$ ion
- ✓Hexaamminecobalt$(II)$ ion
✓
Answer
Correct option: D.
Hexaamminecobalt$(II)$ ion
In $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{2+}$ the oxidation state of $CO$ is $2.$ So the correct $\text{IUPAC}$ name is hexaamminecobalt$(II)$ ion.
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