1.

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)`

Answer» Correct Answer - 4
(A)`Ag_(2)CrO_(4) darr ("yellow") + NH_(3) to [Ag(NH_(3))_(2)]^(+) +CrO_(4)^(2-)`
(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)`


Discussion

No Comment Found

Related InterviewSolutions