1.

Na_(2)CO_(3) cannot be used in place of (NH_(4))_(2)CO_(3) for the percipitation of V group because

Answer»

Na will react with acid radicals
Conc. of `CO_(3)^(2-)` is very low
Mg will be percipitated
`Na^(+)` INTERFERES in the detection of V group

Answer :C


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