Question:
Carbylamine is obtained when aniline is
Carbylamine is obtained when aniline is
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The carbylamine test is given only by primary aliphatic and aromatic amines. Secondary and tertiary amines do not give this test.
Updated On: Apr 24, 2026
- heated with Con. H\(_2\)SO\(_4\)
- treated with NaNO\(_2\) HCl
- heated with CHCl\(_3\) and ethanolic KOH
- treated with CHCl\(_3\) and HCl
- treated with HCl
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept:
The carbylamine reaction (also known as the isocyanide test) is a characteristic test for primary amines.
Step 2: Detailed Explanation:
When a primary amine (like aniline) is heated with chloroform (CHCl\(_3\)) and a strong base (like alcoholic KOH), it forms an isocyanide (carbylamine), which has a very foul smell. The reaction is: \[ R-NH_2 + CHCl_3 + 3KOH \rightarrow R-NC + 3KCl + 3H_2O \] Aniline (C\(_6\)H\(_5\)NH\(_2\)) gives phenyl isocyanide (C\(_6\)H\(_5\)NC).
Step 3: Final Answer:
Carbylamine is obtained when aniline is heated with CHCl\(_3\) and ethanolic KOH.
The carbylamine reaction (also known as the isocyanide test) is a characteristic test for primary amines.
Step 2: Detailed Explanation:
When a primary amine (like aniline) is heated with chloroform (CHCl\(_3\)) and a strong base (like alcoholic KOH), it forms an isocyanide (carbylamine), which has a very foul smell. The reaction is: \[ R-NH_2 + CHCl_3 + 3KOH \rightarrow R-NC + 3KCl + 3H_2O \] Aniline (C\(_6\)H\(_5\)NH\(_2\)) gives phenyl isocyanide (C\(_6\)H\(_5\)NC).
Step 3: Final Answer:
Carbylamine is obtained when aniline is heated with CHCl\(_3\) and ethanolic KOH.
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