d and f-Block ElementsHard
Question
In the separation of Cu2+ and Cd2+ in 2nd group qualitative analysis of cations tetramimine copper (II) sulphate and tetrammine cadmium (II) sulphate react with KCN to form the corresponding cyano complexes. Which one of the following pairs of the complexes and their relative stability enables the separation of Cu2+ and Cd2+ ?
Options
A.K3[Cu(CN)4] more stable and K2[Cd(CN)4] less stable
B.K2[Cu(CN)4] less stable and K2[Cd(CN)4] more stable
C.K2[Cu(CN)4] more stable and K2[Cd(CN)4] less stable
D.K3[Cu(CN)4] less stable and K2[Cd(CN)4] more stable
More d and f-Block Elements Questions
Which one of the following ions exhibits d–d transition and paramagnetism as well ?...[Fe(H2O)6]+2 and [Fe(CN)6]4- differ in :-...Upon heating with Cu2S, the reagent(s) that give copper metal is/are...Zinc blend structure is obtained when Zn2+ occupies :-...Which one of the following nitrates will leave behind a metal on strong heating?...