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How many of the following pairs of ions ...

How many of the following pairs of ions can be separated by `H_(2)S` in dilute `HCl`?
`Bi^(3+)` and `Sn^(4+),Al^(3+)` and `Hg^(2+),Cd^(2+)` and `Zn^(2+),Fe^(3+)` and `Cu^(2+),As^(3+)` and `Sb^(3+)`

A

`Bi^(3+) , Mn^(2+)`

B

`Pb^(2+) , Hg^(2+)`

C

`Zn^(2+) , Cu^(2+)`

D

`Ni^(2+) , Cu^(2+)`

Text Solution

Verified by Experts

The correct Answer is:
B
`Pb^(2+)` and `Hg^(2+)` both will percipitate out by `H_(2)S` in dii. `HCl`.
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