A metal nitrate solution reacts with dilute hydrochloric acid to give a white precipitate which is soluble in concentrated potassium chloride.White precipitate on passing of hydrogen sulphide gas is converted into black precipitate.The black precipitate on boiling with hydrogen peroxide (3%) is converted again to a white precipitate which is soluble in ammonium acetate.The cation of the metal nitrate is :

A metal nitrate solution reacts with dilute hydrochloric acid to give

1.	A metal nitrate solution reacts with dilute hydrochloric acid to give a white precipitate which is soluble in concentrated potassium chloride.White precipitate on passing of hydrogen sulphide gas is converted into black precipitate.The black precipitate on boiling with hydrogen peroxide (3%) is converted again to a white precipitate which is soluble in ammonium acetate.The cation of the metal nitrate is :
Answer» `Pb^(2+)` `Ag^(+)` `HG^(2+)` `BI^(3+)` Solution :`Pb^(2+)+2Cl^(-)toPbCl_2darr ("white"), PbCl_2+ 2Cl^(-)to[PbCl_4]^(2-)` (COLOURLESS soluble complex ) `PbCl_2darr +H_2StoPbSdarr`(black)+2HCl `PbS+4H_2O_2toPbSO_4`(white)+`4H_2O` `PbSO_4darr +2CH_3COONH_4to(NH_4)_2SO_4+(CH_3COO)_2Pb`