The violet colour obtained during the test of sulphur Lassaigne's test is due to the formation of

The violet colour obtained during the test of sulphur Lassaigne's test

1.	The violet colour obtained during the test of sulphur Lassaigne's test is due to the formation of
Answer» `Fe_(4)[Fe(CN)_(6)]_(3)` `Na_(3)[Fe(CN)_(6)]` `Fe_(3)(Fe(CN)_(6))_(4)` `Na_(4)[Fe(CN)_(5)NOS]` Solution :Prussian blue is ferric FERROCYANIDE`Fe_(4)[Fe(CN)_(6)]_(3)`.