Among Fe 3+ , Pb 2+ , Cu 2+ and Mn 2+ , identify the one that gets precipitated out while passing H 2 S in presence of NH 4 OH as group reagent. The highest possible oxidation state of the corresponding metal is

Chemistry · Practical Inorganic chemistry (Qualitative Analysis)

JEE Main 2026 — 4 April, Evening Shift — Question 61

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

Option A:
3
Option B:
4
Option C:
2
Option D:
7
Correct

Answer: D

Step-by-step solution

Group IV reagent : $\mathrm{NH}_{4} \mathrm{OH}+\mathrm{H}_{2} \mathrm{~S}$ $\mathrm{Mn}^{+2}$ will be precipitated out and hence highest possible oxidation state of Mn is +7

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Exam: JEE Main 2026
Paper: 4 April, Evening Shift
Subject: Chemistry
Chapter: Practical Inorganic chemistry (Qualitative Analysis)
Topic: Identification of Cations (Groups 1 to 3)