Appearance of blood red colour, on treatment of the sodium fusion extract of an organic compound with $\mathrm{FeSO}{4}$ in presence of concentrated $\mathrm{H}{2} \mathrm{SO}{4}$ indicates the pr

Question

Appearance of blood red colour, on treatment of the sodium fusion extract of an organic compound with $\mathrm{FeSO}{4}$ in presence of concentrated $\mathrm{H}{2} \mathrm{SO}{4}$ indicates the presence of element/s.

Canvas Classes · Accepted Answer

Step 1: Recall the Lassaigne Test System

In the Lassaigne test, the organic compound is fused with sodium metal to form ionic compounds in the sodium extract:
- N → 
- S → 
- N + S together →  (sodium thiocyanate)
- Halogens →

Step 2: Identify the Blood Red Colour Test

The sodium extract is treated with  in the presence of conc. .

Under these conditions:
- The  from  is oxidised to  by conc. 
-  reacts with  (thiocyanate) → blood red  complex

Thiocyanate () is formed when both N and S ar

More questions from Practical Organic Chemistry