Which of the following analytical reagents yields a brilliant, specific rosy-red precipitate with io — Qualitative and Quantitative Analysis Chemistry Question

💡 Solution & Explanation

DMG specifically reacts with $Ni^{2+}$ in a mildly alkaline medium (provided by $NH_4OH$) to form a stable, square planar, rosy-red complex: bis(dimethylglyoximato)nickel(II). The complex is stabilized by intramolecular hydrogen bonding.