A solution of a metal ion when treated with KI gives a red precipitate which dissolves in…
Chemistry · JEE Advanced · NTA Exams — Principles Related To Practical Chemistry
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 deep blue crystalline precipitate. The metal ion is
- Pb2+
- Hg2+
- Cu2+
- Co2+.
Answer
(B) Hg 2+
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