Yellow Ammonium Sulphide (YAS) is used to separate the subgroups of Group II. Which of the following — Qualitative and Quantitative Analysis Chemistry Question

💡 Solution & Explanation

Subgroup IIB sulphides ($As, Sb, Sn$) are amphoteric in nature and dissolve in Yellow Ammonium Sulphide to form soluble thio-complexes. Subgroup IIA ($Pb, Cu, Cd, Hg, Bi$) remains insoluble.