Hinsberg Test
Hinsberg reagent (benzenesulfonyl chloride) is used to distinguish:
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About This Question
- Subject
- chemistry
- Chapter
- organic compounds containing nitrogen
- Topic
- hinsberg test
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
Primary, secondary, and tertiary amines
The Hinsberg Test uses Benzenesulfonyl chloride (C6H5SO2Cl) to differentiate between classes of amines:
- Primary (1∘) Amines: React to form a sulfonamide which contains an acidic hydrogen on nitrogen. Thus, it is soluble in alkali (NaOH).
- Secondary (2∘) Amines: React to form a sulfonamide with NO acidic hydrogen. Thus, it is insoluble in alkali.
- Tertiary (3∘) Amines: Do not react with the reagent as they lack an H atom on Nitrogen. They remain soluble in the acidic reagent but insoluble once the solution is made basic.
This medium difficulty chemistry question is from the chapter organic compounds containing nitrogen, covering the topic of hinsberg test. It appeared in the 2025 exam.
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