Carbylamine Test
Easychemistry
Carbylamine test requires chloroform and alcoholic KOH; characteristic product is:
Select the correct option:
Solution
Incorrect! Answer:
Isocyanide (foul smell)
- Reaction: Aliphatic or aromatic primary amine + CHCl3+3KOHΔR−NC+3KCl+3H2O.
- Characteristic: The product is an alkyl or aryl isocyanide (also called a carbylamine).
- Observation: Isocyanides have a highly unpleasant, offensive odor (described as a 'foul smell').
- Diagnostic Value: Since only primary amines (1∘) undergo this reaction, it is used to distinguish them from secondary (2∘) and tertiary (3∘) amines.
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About This Question
- Subject
- chemistry
- Chapter
- nitrogen organics
- Topic
- carbylamine test
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Isocyanide (foul smell)
- Reaction: Aliphatic or aromatic primary amine + CHCl3+3KOHΔR−NC+3KCl+3H2O.
- Characteristic: The product is an alkyl or aryl isocyanide (also called a carbylamine).
- Observation: Isocyanides have a highly unpleasant, offensive odor (described as a 'foul smell').
- Diagnostic Value: Since only primary amines (1∘) undergo this reaction, it is used to distinguish them from secondary (2∘) and tertiary (3∘) amines.
This easy difficulty chemistry question is from the chapter nitrogen organics, covering the topic of carbylamine test. It appeared in the 2025 exam.
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