Which of the following can't be separated by `H_(2)S` in dil `HCl` ?

Options

A. `Bi^(3+) , Mn^(2+)`
B. `Pb^(2+) , Hg^(2+)`
C. `Zn^(2+) , Cu^(2+)`
D. `Ni^(2+) , Cu^(2+)`

Answer

B

Explanation

`Pb^(2+)` and `Hg^(2+)` both will percipitate out by `H_(2)S` in dii. `HCl`.