The Lassiagne's extract is boiled with dil before testing for halogens because,

Question

The Lassiagne's extract is boiled with dil  before testing for halogens because,

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Step 1: Understand the Problem

In Lassaigne's test, before testing for halogens with , the sodium extract is boiled with dilute . Why?

The sodium extract may contain:
-  (from nitrogen)
-  (from sulphur)
-  (from halogens)

Step 2: The Problem with  Test Without Pre-treatment

If we add  directly to the extract without acidification:
-  — white precipitate (mimics AgCl)
-  — black precipitate (masks halide test)

Both  and  would interfere with and confuse the halide test.

Step 3: Why Boil wi

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