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In an acidified aqueous solution of Mn^(...

In an acidified aqueous solution of `Mn^(2+), Ni^(2+), Cu^(2+) and hg^(2+)` ions, `H_2S` gas was passed. Precipitates are

A

`CuS` and `HgS`

B

`MnS` and `CuS`

C

`MnS` and `NiS`

D

`NiS` and `HgS`

Text Solution

Verified by Experts

The correct Answer is:
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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