Among the following sulphides precipitated in group IV (by $\mathrm{H}{}_2\mathrm{S}$ in ammoniacal medium), the white one is

More questions on Group reagents and group separation logic

• The group reagent for the precipitation of group III cations (Fe^3+, Al^3+, Cr^3+) as hydroxides is NEET level
• Solid NH4Cl is added before NH4OH in the group III analysis mainly because it NEET level
• Group V cations (Ba^2+, Sr^2+, Ca^2+) are precipitated as carbonates using NEET level
• Group II cations are precipitated by passing H2S into the solution made about 0.3 M in HCl. The role of the HCl is to JEE Main level
• Zn^2+ is not precipitated when H2S is passed into a solution containing dilute HCl, because JEE Main level
• The filtrate from group II is boiled before the group III reagent is added. The main purpose is to JEE Main level