Tests were carried out on an aqueous solution of an unknown compound, P. The observations are recorded in the table. test observation aqueous green precipitate, soluble in sodium hydroxide added excess giving a green solution dilute nitric acid added white precipitate then aqueous barium nitrate dilute nitric acid added no precipitate then aqueous silver nitrate Which ions are present in P?

Source: 5070/11 · 3 · 2018