A solution of a metal ion when treated with KI gives a red precipitate which dissolves in excess KI to give a colourless solution. Moreover, the solution of metal ion on treatment with a solution of cobalt (II) thiocyanate gives rise to a deep blue crystalline precipitate.The metal ion isa. Pb^2+b. Hg^2+c. Cu^2+d. Co^2+
Radhika Batra , 10 Years ago
Grade 11
