A solution of a metal ion when treated with KI solution gives a red precipitate which dissolves in excess of KI solution to give a colourless solution. Moreover, the solution of the same metal ion on treatment with the solution of cobalt (II) thiocyanate gives rise to a deep blue crystalline precipitate. The metal ion is

A solution of a metal ion when treated with KI solution gives a red pr

1.	A solution of a metal ion when treated with KI solution gives a red precipitate which dissolves in excess of KI solution to give a colourless solution. Moreover, the solution of the same metal ion on treatment with the solution of cobalt (II) thiocyanate gives rise to a deep blue crystalline precipitate. The metal ion is
Answer» `PB^(2+)` `Hg^(2+)` `Cu^(2+)` `CO^(2+)` SOLUTION :It is the correct answer : `{:("Hg"^(2+),+,2l^(-),RARR,Hgl_(2),),(,,(Kl),,("Scarlet red ppt"),),(Hgl_(2),+,2Kl,rarr,underset(("Colourless"))(K_(2)Hgl_(4)),),("Hg"^(2+),+,Co(SCN)_(2),rarr,underset(("Deep blue crystalline ppt."))(Co [Hg (SCN)_(2)]),):}`