In the Lassaigne's test for the detection of nitrogen in an organic compound, the appearance of blue colored compound is due to:

ferric ferricyantde

No worries! We‘ve got your back. Try BYJU‘S free classes today!

ferrous ferricyanide

No worries! We‘ve got your back. Try BYJU‘S free classes today!

ferric ferrocyanide

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

ferrous ferrocyanide

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C ferric ferrocyanide
In the Lassaigne's test for the detection of nitrogen in an organic compound, the appearance of a blue coloured compound is due to ferric ferrocyanide.

In this test, sodium fusion extract is boiled with ferrous sulphate and then acidified with conc. sulphuric acid. Prussian blue colour complex ferric ferrocyanide confirms the presence of nitrogen.

$F e S O_{4} + 2 N a O H \to F e (O H)_{2} + N a_{2} S O_{4}$

$6 N a C N + F e (O H)_{2} \to N a_{4} F e (C N)_{6} + 2 N a O H$

$3 N a_{4} F e (C N)_{6} + 4 F e C l_{3} \to F e_{4} [F e (C N)_{6}]_{3} + 12 N a C l$

It is ferric ferrocyanide.

Hence, the correct option is $C$

Suggest Corrections

Similar questions

Discuss and give chemical reaction of Lassaigne Test for

1. Nitrogen in the organic compound.

2. Nitrogen and Sulphur, both in the organic compound.

Join BYJU'S Learning Program