Which of the followig ions will finally give a black precipitate with `Ag^(o+)` ion?

Which of the following ions will give a coloured precipitate with lead nitrate solution

Which of the following metal ion can give red precipitate with K_(2) CrO_(4)

Which of the following ions will give black ppt. with H_2S in an acidic solution ?

Which of the following reagents gives a yellow precipitate with a hot faintly acidic solution of Bi^(3+) ions?

Cu^(2+) ions give white precipitate with :

Cu^(2+) ions give white precipitate with :

Which of the followig reaction is not a ion-exchange reaction?