NEETChemistryGeneral Organic Chemistry
What precaution is taken if nitrogen or sulfur is also present in the compound during the test for halogens?
Options
- AThe solution is heated to a higher temperature
- BThe sodium fusion extract is acidified with sulfuric acid
- CThe sodium fusion extract is boiled with concentrated nitric acid
- DSilver nitrate is added directly to the solution
Correct answer
C. The sodium fusion extract is boiled with concentrated nitric acid
Step-by-step solution
If nitrogen or sulfur is present, the sodium fusion extract is first boiled with concentrated nitric acid to decompose cyanide or sulfide ions, which might otherwise interfere with the silver nitrate test for halogens.