1.

Mg is not precipitated in V group because

Answer»

`MgCO_3` is soluble in WATER
`MgCO_3` is soluble in `NH_4 CL`
`MgCO_3` is soluble in `NH_4OH`
NONE of these.

Solution :The CONCENTRATION of `CO_(3)^(2-)` ions is very low which does not allow the ionic product of `Mg^(2-)` and `CO_(3)^(2-)` ions to exceed the solubility product in presence of `NH_4 Cl`.


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