During halogen test, sodium fusion extract is boiled with concentrated HNO to 3 (A) remove unreacted — Practical Organic Chemistry and Purification Chemistry Question
Question
During halogen test, sodium fusion extract is boiled with concentrated HNO to 3 (A) remove unreacted sodium (B) decompose cyanide or sulphide of sodium (C) extract halogen from organic compound (D) maintain the pH of extract.
Answer: B) DECOMPOSE CYANIDE OR SULPHIDE OF SODIUM
💡 Solution & Explanation
If nitrogen or sulphur is also present in the compound, 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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