1.

An aqueous solution contains Hg^(2+),Hg_(2)^(2+),Pb^(2+) and Cd^(2+). The addition of HCl (6N) will precipitate

Answer»

`Hg_(2)Cl_(2)` only
`PbCl_(2)` only
`PbCl_(2)` and `Hg_(2)Cl_(2)`
`PbCl_(2) and HgCl_(2)`

Solution :Only `PbCl_(2)` and `Hg_(2)Cl_(2)` will precipitate as `Pb^(2+)` and `Hg_(2)^(2+)` as FIRST group basic radicals and their solubility PRODUCT is less than the other radicals.


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