HgCI2 and I2 both when dissolved in water containing ions, the pair of species formed is [2017]

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Solution

Q.
${HgCl}_{2}$ and $I_{2}$ both when dissolved in water containing $I^{-}$ ions, the pair of species formed is [2017]

1 $H g I_{2}, I^{-}$

2 $H g I_{4}^{2 -}, I_{3}^{-}$

3 $H g_{2} I_{2}, I^{-}$

4 $H g I_{2}, I_{3}^{-}$

Ans.
(2)

${HgCl}_{2 (a q)} + 4 I_{(a q)}^{-} ⟶ {HgI}_{4 (a q)}^{2 -} + 2 {Cl}_{(a q)}^{-}$

$I_{2 (s)} + I_{(a q)}^{-} ⟶ I_{3 (a q)}^{-}$

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