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Amongst the following, the total number of compounds soluble in concentrated NH_(3) solution is: (A)Ag_(2)CrO_(4) , (B)Cu(OH)_(2).CuSO_(4) , ( C)PbSO_(3) , (D)Al(OH)_(3) , (E)Ni(OH)_(2) (F)Zn_(3)(PO_(4))_(2) , (G)BaSO_(4) , (H)Bi(OH)_(2)NO_(3) , (I)Mn(OH)_(2) |
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Answer» (B)`Cu(OH)_(2).CuSO_(4) darr ("blue") + 8NH_(3) to 2[Cu(NH_(3))_(4)]^(2+)+2OH^(-)` ( C)`PbSO_(3) darr ("white") +4OH^(-) to [Pb(OH)_(4)]^(2-) + SO_(3)^(2-)` Soluble in sodium hydroxide not in `NH_(3)` (D)Soluble in sodium hydroxide not in `NH_(3)` (E)`Ni(OH)_(2) darr ("green") + 6NH_(3) to [Ni(NH_(3))_(6)]^(2+) ("DEEP blue colouration") + 2OH^(-)` (F)`Zn_(3)(PO_(4))_(2) darr ("white") + 12NH_(3) to 3[Zn(NH+_(3))_(4)]^(2+) + 2PO_(4)^(3-)` (G)Insoluble in `NH_(3)` soluble appreciably in boiling concentrated `H_(2)SO_(4)` (H)`Bi(OH)_(2) NO_(3)` is insoluble in `NH_(3)` (I)Insoluble in `NH_(3)` but soluble in ammonium salts liberating `NH_(3)` |
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