In third group of qualitive analysis, `NH_(4)Cl` is added before `NH_(4)OH` so thatA. `OH^(-)` concentration decreasesB. only group III radical get precipitated as hydroxide but others with high solubility product do notC. `K_(sp)` of group III hydroxide is highD. Group III radicals get precipitated as chlorides

In third group of qualitive analysis, `NH_(4)Cl` is added before `NH_(

1.	In third group of qualitive analysis, `NH_(4)Cl` is added before `NH_(4)OH` so thatA. `OH^(-)` concentration decreasesB. only group III radical get precipitated as hydroxide but others with high solubility product do notC. `K_(sp)` of group III hydroxide is highD. Group III radicals get precipitated as chlorides
Answer» Correct Answer - A::B `NH_(4)OH` is a weak electrolyte and dissociates partially as `NH_(4)OHhArrNH_(4)^(+)+OH^(-).` On adding `NH_(4)Cl,` the dissociation of `NH_(4)OH` is suppressed such that `[OH^(-)]` is very less and only less soluble hydroxides are precipitated. Hence choices (a) and (b) are correct while (c) and (d) are incorrect.

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