JEE Advanced 2007 Chemistry question
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 is
Answer: (B)
Solution
gives a scarlet-red precipitate of with KI, which dissolves in excess KI forming the colourless complex (Nessler's reagent base). With cobalt(II) thiocyanate it
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