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JEE CHEMISTRY MCQ: PRACTICAL CHEMISTRY

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To a metal nitrate, when KI\text{KI} solution is added, a black precipitate is produced at first, on adding excess of KI,\text{KI}, orange solution is produced. Identify the metal ion.
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Correct option: A
Hg2+\mathrm{Hg}^{2+}
Option A (Hg2+\mathrm{Hg}^{2+}) is correct because Hg2+\mathrm{Hg}^{2+} forms a black precipitate with KI, which dissolves in excess KI to form an orange solution.

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