The correct match of the group reagents in List-I for precipitating the metal ion given in List-II from solutions, is:
| List-I | List-II |
|---|
| P. Passing \( \mathrm{H_2S} \) in the presence of \( \mathrm{NH_4OH} \) | 1. \( \mathrm{Cu^{2+}} \) |
| Q. \( \mathrm{(NH_4)_2CO_3} \) in the presence of \( \mathrm{NH_4OH} \) | 2. \( \mathrm{Al^{3+}} \) |
| R. \( \mathrm{NH_4OH} \) in the presence of \( \mathrm{NH_4Cl} \) | 3. \( \mathrm{Mn^{2+}} \) |
| S. Passing \( \mathrm{H_2S} \) in the presence of dilute \( \mathrm{HCl} \) | 4. \( \mathrm{Ba^{2+}} \) |
| 5. \( \mathrm{Mg^{2+}} \) |
