[[“Sr. No”,”Experiment”,”Observation”,”Inference”],[“1″,”Salt solution + NaOH + heat”,”No smell of ammonia”,”Zero Group, (NH4+ absent)”],[“2″,”Salt solution + dil . HCl”,”No white Ppt”,”Group I, (Pb2+ absent)”],[“3″,”Above solution + H2S gas”,”Black Ppt is formed”,”Group II, (Cu2+ / Pb2+ may be present)”],[“4″,”Dissolve above ppt in HNO3 Solution Divide the above solution in 2 parts .”,””,””],[“#colspan#”,”(b) Confirmative test :”,”#colspan#”,”#colspan#”],[“Sr. No.”,”Experiment”,”Observation”,”Inference”],[“1″,”NH4OH test : 1st part + NH4OH”,”Deep bule colour”,”Cu2+ confirmed”],[“2″,”Potassium ferrocynide test : IInd part + K4[Fe(CN)6]”,”Chocolate brown ppt of Copper ferrocyanide is formed”,”Cu2+ confirmed”]]