How do you detect nitrogen, sulphur and halogen using sodium fusion ex – InterviewSolution

1.

How do you detect nitrogen, sulphur and halogen using sodium fusion extract, (SFE) (Lassaigne’s test)?

Answer»

Elements	Experiment	Observation
Nitrogen	SFE + freshly prepared FeSO₄ solution, heat, FeCl₃solution + dil.HCl	Prussian blue ppt/colour
Sulphur	SFE + dil.acetic acid + lead acetate	Black ppt
Halogen S	SFE + dil. HNO₃ , boil, cool, +AgNO3 solution	White ppt-chlorine Pale yellow ppt-bromine Yellow ppt- iodine

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