In presence of HCl, H_(2)S results theprecipitationof group-2 radicals but not group-4 radicals during qualitative analysis. It is due to

In presence of HCl, H_(2)S results theprecipitationof group-2 radicals

1.	In presence of HCl, H_(2)S results theprecipitationof group-2 radicals but not group-4 radicals during qualitative analysis. It is due to
Answer» higher concentration of `H^(+)` lower concentration of `H^(+)` higher concentration of `S^(2-)` lower concentration of `S^(2-)` Solution :Dissociation of `H_(2)S` is suppressed in presence of HCl due to common ION EFFECT. This decreases the `S^(2-)` ion concentration and hence only GROUP 2 radicals are precipitated as they have LOW solubility products.