In the separation of Cu^(2+) and Cd^(2+) in 2nd group qualitiative analysis of cations, tetrammine 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 relaive stability enalbles the separation of Cu^(2+) ad Cd^(2+) ?

In the separation of Cu^(2+) and Cd^(2+) in 2nd group qualitiative ana

1.	In the separation of Cu^(2+) and Cd^(2+) in 2nd group qualitiative analysis of cations, tetrammine 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 relaive stability enalbles the separation of Cu^(2+) ad Cd^(2+) ?
Answer» `K_2[CU(CN)_4]` more stable and `K_2[Cd(CN)_4]` LESS stable `K_2[Cu(CN)_4]` less stable and `K_2[Cd(CN)_4]` more stable `K_2[Cu(CN)_4]` more stable and `K_2[Cd(CN)_4]` less stable `K_2[Cu(CN)_4]` less stable and `K_2[Cd(CN)_4]` more stable Answer :A