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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3si256

The compound shown does not give the carbylamine test. Select all of the structures shown that give a foul-smelling isocyanide on warming with and alcoholic KOH.

  1. AStructure A
  2. BStructure B
  3. CStructure C
  4. DStructure D

Answer: B, D

The carbylamine reaction needs a primary amine ( on carbon). B (aniline) and D (isopropylamine) are primary amines. A is secondary, and C is an amide whose nitrogen is not a free amine, so neither gives the test.
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