During halogen test, sodium fusion extract is boiled with...

During halogen test, sodium fusion extract is boiled with concentrated

{HNO}_{3}

Options

Aremove unreacted sodium
Bdecompose cyanide or sulphide of sodium
Cextract halogen from organic compound
Dmaintain the $pH$ of extract.

Correct answer

B. decompose cyanide or sulphide of sodium

Step-by-step solution

The sodium fusion extract is first boiled with concentrated nitric acid to decompose cyanide or sulphide of sodium formed during Lassaigne's test. These ions would otherwise interfere with silver nitrate test for halogens.

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