JEE Main 2024 Chemistry question
The Lassaigne's extract is boiled with dil. HNO₃ before testing for halogens because,
Answer: (C)
Solution
The Lassaigne's extract is boiled with dilute HNO₃ to decompose Na₂S and NaCN, if formed: NaCN + HNO₃ → NaNO₃
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