See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

    3 3 CrCl NaOH Cr OH NaCl soln      2 3 2 Hg NO 2 2 H O NaOH 3 NH  3 AgNO 2 4 Ag CrO brick red ppt.   2 4 Na CrO yellow solution 2 2 Hg Cl white ppt. Shiny black ppt. Hg NH2 Cl Hg 