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

Answer 1

Correct Answer - A
(a) In the acidic medium, only the cations of group (II) is mixture analysis i.e. `Cu^(2+)(aq)" and "Hg^(2+)(aq)` ions are precipitated as their respective sulphides. These are CuS and HgS (both black in colour).