1.

Few drop of HNO_(3) are added to group if before precoodinh to group III in order to :

Answer»

Covert `Fe^(2+)` to `Fe^(3+)`
CONVERT` Fe^(3+)` to `Fe^(2+)`
PPT GROUP III
None of these

Solution :`Fe^(2+)` is oxidised in `Fe^(3+)` in order toprecipitate `Fe(OH)_(3)`


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