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SN1 Reaction Mechanism

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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:

A

P b^{+ 2}

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B

H g^{+ 2}

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C

C o^{+ 2}

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D

C u^{+ 2}

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Solution

The correct option is B $H g^{+ 2}$
$\begin{matrix} {H g}^{+ 2} reacts with KI to form red ppt which dissolves in excess KI to form colourless solution. \end{matrix}$
${H g}^{+ 2} reacts with [C o {(S C N)_{4}]}_{4}^{- 2} to give blue complex.$

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Q. A solution of 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 :

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

Q. A solution of a metal ion when treated with

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gives a red precipitate which dissolves in excess

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