Primary, secondary and tertiary amines can be separated using:
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- Chloroform and KOH
- Acetyl amide
- Benzene sulphonic acid
- para-Toluene sulphonyl chloride
The Correct Option is D
Solution and Explanation
1. Primary amine (RNH2) gives the sulphonamide ArSO2NHR, which has an acidic N-H and dissolves in KOH.
2. Secondary amine (R2NH) gives ArSO2NR2, which has no N-H and is insoluble in KOH.
3. Tertiary amine does not react (no N-H) and remains separable.
Chloroform/KOH only tests primary amines (carbylamine test), acetyl amide is not a reagent for this, and benzene sulphonic acid only forms a salt.
Answer: (4) para-Toluene sulphonyl chloride
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