Which of the following analytical observations are strictly correct regarding the elemental detectio — Qualitative and Quantitative Analysis Chemistry Question

💡 Solution & Explanation

All statements accurately reflect the standard confirmatory tests. Nitrogen forms Prussian blue. Sulphur forms black $PbS$ with lead acetate or a violet thionitrosyl complex with sodium nitroprusside. Phosphorus is oxidized by $Na_2O_2$ to phosphate, which yields the canary yellow $(NH_4)_3PO_4 \cdot 12MoO_3$ precipitate.