Identification of cationsMedium

Group IV Cation Precipitation and Oxidation

Among $\mathrm{Fe}^{3+}, \mathrm{Pb}^{2+}, \mathrm{Cu}^{2+}$ and $\mathrm{Mn}^{2+}$ , identify the one that gets precipitated out while passing $\mathrm{H}_2\mathrm{S}$ in presence of $\mathrm{NH}_4\mathrm{OH}$ as group reagent. The highest possible oxidation state of the corresponding metal is

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