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Question
The lassaigne's extract is boiled with dil. HNO3 before testing for halogens because ______.
Options
Silver halides are soluble in HNO3
Na2S and NaCN are decomposed by HNO3
Ag2S is soluble in HNO3
AgCN is soluble in HNO3
MCQ
Fill in the Blanks
Solution
The lassaigne's extract is boiled with dil. HNO3 before testing for halogens because Na2S and NaCN are decomposed by HNO3.
Explanation:
The extract is boiled with concentrated HNO3 to extract N and S via the decomposition of NaCN and Na2S.
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Qualitative Analysis of Organic Compounds - Detection of Other Elements
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