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
The equilibrium2CuI ⇋ Cuo + CuII in aqueous medium at 25oC shifts towards the left in the presence of...Knowing that the Chemistry of lanthanoids (Ln) is dominated by its +3 oxidation state, which of the following statements...A red solid is insoluble in water. However it becomes soluble if some KI is added to water. Heating the red solid in a t...The existence of two different coloure complexes with the composition of [Co(NH3)4Cl2]+ is due to...Larger number of oxidation states are exhibited by the actinoids than those by the lanthanoids, the main reason being...