Chemistry - Salt Analysis Question with Solution | TestHub

${\mathrm{Ag}}^{\oplus }$ ions do not give white precipitate with excess of concentrated HCl .

${\mathrm{Cu}}^2\oplus$ ions produce a white precipitate when KCN solution is added in a small quantity, and allowed to stand.

${\mathrm{Hg}}^2\oplus$ ions give deep blue precipitate with cobalt acetate and ammonium thiocyanate.

Black precipitate of ${\mathrm{BiI}}_3$ turns orange when heated with water.