In the Lassaigne's test for halogens they are precipitated as

Lassaigne's test fails in

What is Lassaigne's test?

What is Lassaigne's test?

Assertion : Absence of blood red colouration, during the Lassaigne's test for nitrogen definitely shows the absence of sulphur in the organic compound. Reason : Organic compounds containing both nitrogen and sulphur will necessarily give blood red colouration during the Lassaigne's test for nitrogen.

Lassaigne's test for halogens gave a pale yellow ppt. The halogen is

In the Lassaigne's test for nitrogen in an organic compound, the prussian blue colour is obtained due to the formation of.

Sometimes a red colour is not produced in the Lassaignes test even if both nitrogen and sulphur are present in the Organic compound. Explain

In Lassaignes test when both N and S are present blood red colour is obtained. This is due to the formation of (1)Ferric ferrocyanide (2)Ferric cyanide (3)Ferric thiocyanate (4)Ferric hydroxide.