Chemistry - Salt Analysis Question with Solution | TestHub

$M_1$ reacts with H₂O to produce an alkaline solution and $G_1$ (H₂ gas), as confirmed by its production from Zn in alkaline medium. $M_2$ is Mercury (Hg), which reacts with conc. HNO₃ and KI/KOH to form Nessler’s reagent ($R_1$) used to detect NH₃ (G₂). H₂ (Gas $G_1$) reduces red-hot CuO to metallic Cu (A) and has a bond order of 1 with a diamagnetic nature (C).

Options B and D are incorrect because Hg with conc. H₂SO₄ yields SO₂, and the combustion product (H₂O) is neutral.