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NEET2026ChemistryChapterActual

Consider the chemical reaction scheme shown in the given figure. Which of the following statements is correct regarding the major products Y and Z ?

Options

  1. AProduct Y is methanamine and product Z is acetic acid.
  2. BBoth Y and Z are primary amines, but Z contains one carbon atom less than X .
  3. CY and Z are successive members of the same homologous series.
  4. DProduct Z gives a positive carbylamine test whereas product Y does not.

Correct answer

C. Y and Z are successive members of the same homologous series.

Step-by-step solution

Reaction of acetic acid with ammonia followed by heating yields acetamide. CH ₃ COOH NH ₃, CH ₃ CONH ₂ (X) Acetamide (X) undergoes Hoffmann bromamide degradation upon reaction with Br ₂ and NaOH to form a primary amine with one carbon atom less, which is methanamine. CH ₃ CONH ₂ Br ₂, NaOH CH ₃ NH ₂ (Y) Acetamide (X) undergoes reduction with LiAlH ₄ to form a primary amine with the same number of carbon atoms, which is ethanamine. CH ₃ CONH ₂ (i) LiAlH ₄, ether (ii) H ₂ O CH ₃ CH ₂ NH ₂ (Z) Y is methanamine ( CH ₃

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