Passing `H_(2)S` gas a mixture of `Mn^ (2+) ,Ni^(2+) ,Cu^(2+)` and `Hg^(2+)` ions in an acidified aqaeous solution precipitate

Options

A. `CuS and HgS`
B. `MnS and CuS`
C. `MnS and NiS`
D. `NiS and HgS`

Answer

a

Explanation

In acid solution `[S^(2-)]` is low so, `CuS` and `HgS` will precipitate more easilly more due to low `K_(sp)` MnS will precipitate If `H_(2)S` is passed in alkaline solution