JEE Main 2026 · 4 Apr · Shift 2 · Chemistry Q69

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ChemistrySingle correct+4 / -1Question 69 of 75

Among $\ce{Fe^{3+}}$ , $\ce{Pb^{2+}}$ , $\ce{Cu^{2+}}$ and $\ce{Mn^{2+}}$ , identify the one that gets precipitated out while passing $\ce{H2S}$ in presence of $\ce{NH4OH}$ as group reagent. The highest possible oxidation state of the corresponding metal is

Answer and worked solution

Official answer: D

Group IV. $\ce{H2S}$ with $\ce{NH4OH}$ precipitates the group IV sulphides; of the ions listed this is $\ce{Mn^{2+}}$ (as MnS). ( $\ce{Fe^{3+}}$ comes down earlier with the group III reagent $\ce{NH4OH}$ alone; $\ce{Pb^{2+}}$ and $\ce{Cu^{2+}}$ belong to group II.)

Highest oxidation state of Mn is +7 (as in $\ce{KMnO4}$ ).

(D)

Topics:Cation analysis Transition element properties

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JEE Main 2026 · 4 Apr · Shift 2, Chemistry question 69