1.

Concentrated nitric acid is added before proceeding to test for group III members. This is to

Answer»

OXIDISE any remaining `H_(2)S`
Convert FERROUS ions to ferric ions
form nitrates which gives grannular precipitate
increases ionisation of ammonium hydroxide

Solution :To oxidise ferrous ion into ferrice ion OTHERWISE `FE^(2+)` is not COMPLETELY precipitated as `Fe(OH)_(2)` , as ferrous hydroxide is more soluble in water than `Fe(OH)_(3)`.


Discussion

No Comment Found

Related InterviewSolutions