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

Question

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

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

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - A
In presence of acidic medium, ionisation of `H_(2)S` is supressed to less number of `S^(2-)` ions are produces.So only those sulphides are precipitated which have low solubility product `(K_(sp))` value, For example `CuS` and `HgS`.

4 views Answered 2023-02-05 15:29