Question

The ion that cannot ne precipitated by both `HCl` and `H_(2)S` is
A. `Pb^(2+)`
B. `Fe^(3+)`
C. `Zn^(2+)`
D. `Cu^(2+)`

Answer 1

Correct Answer - A
`Pb^(2+)` can be precipitated by HCl (in cold ) as white `PbCl_(2)` in group I of analytical chemistry. It can also be precipitated as black PbS in group II of analytical chemistry.