Chemistry - Salt Analysis Question with Solution | TestHub

Black coloured sulphides$\{\mathrm{P}\mathrm{b}\mathrm{S},\mathrm{C}\mathrm{u}\mathrm{S},\mathrm{ }\mathrm{H}\mathrm{g}\mathrm{S},\mathrm{A}{\mathrm{g}}_2\mathrm{S},\mathrm{ }\mathrm{N}\mathrm{i}\mathrm{S},\mathrm{C}\mathrm{o}\mathrm{S}\}$
*$\mathrm{B}{\mathrm{i}}_2{\mathrm{S}}_3$in its crystalline form is dark brown but Bi₂S₃precipitate obtained is black in colour.