Passing `H_(2)S` gas into a mixture of `Mn^(2+), Ni^(2+), Cu^(2+)` and `Hg^(2+)` ions in an acidified aqueous solution precipitatesA. `CuS` and `HgS`B. `MnS` and `CuS`C. `MnS` and `NiS`D. `NiS` and `HgS`

Passing `H_(2)S` gas into a mixture of `Mn^(2+), Ni^(2+), Cu^(2+)` and

1.	Passing `H_(2)S` gas into a mixture of `Mn^(2+), Ni^(2+), Cu^(2+)` and `Hg^(2+)` ions in an acidified aqueous solution precipitatesA. `CuS` and `HgS`B. `MnS` and `CuS`C. `MnS` and `NiS`D. `NiS` and `HgS`
Answer» Correct Answer - A In acidic solution `[S^(2-)]` is low. So `CuS` and `HgS` (IInd group cations) will be precipitated more easily due to low `K_(sp)` value. `NiS` and `MnS` (IV group cation) will precipitate if `H_(2)S` is passed in basic medium.

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Passing `H_(2)S` gas into a mixture of `Mn^(2+), Ni^(2+), Cu^(2+)` and `Hg^(2+)` ions in an acidified aqueous solution precipitatesA. `CuS` and `HgS`B. `MnS` and `CuS`C. `MnS` and `NiS`D. `NiS` and `HgS`

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