Question

Passing $H_{2}S$ gas into a mixture of $M{n}^{2+},N{i}^{2+},C{u}^{2+}$ and $H{g}^{2+}$ ions in an acidified aqueous solution precipitates.

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

Answer 1

The correct option is A CuS and HgS

$H_{2}S$ in presence of aqueous acidified solution precipitates as sulphide of $Cu$ and $Hg$ as $CuS$ and $HgS$. But the solubility product of $M{n}^{2+},N{i}^{2+}$ are higher thus they remain unaffected.

Hence, the correct option is $\text{A}$