1.

PassingH_(2)S gasa mixtureof Mn^ (2+) ,Ni^(2+) ,Cu^(2+) and Hg^(2+) ions in an acidifiedaqaeous solution precipitate

Answer»

`CuS and HGS`
`MnS and CuS`
`MnS and NIS`
`NiS and HgS`

Solution :In acid solution `[S^(2-)]` is LOW so, `CuS` and `HgS` willprecipitatemore easillymoredueto low `K_(sp)` MnS willprecipitate If `H_(2)S` is passed in alkalinesolution


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