Target Exam

CUET

Subject

Chemistry

Chapter

Organic: Amines

Question:

An aromatic compound (A) on treatment with aqueous ammonia and heating forms compound (B) which on heating with Br2 and KOH forms a compound (C) of molecular formula C6H7N.  

Identify (C) from the given reaction. 

Options:

Benzamine 

Benzamide 

diprop-2-ynylamine

None of the above 

Correct Answer:

None of the above 

Explanation:

The correct answer is option 4- None of the above

  1. A is likely benzoyl chloride or benzoic acid, which on reacting with aqueous ammonia and heating gives benzamide (B).

  2. Compound B (benzamide) when heated with Br₂ and KOH undergoes Hofmann bromamide reaction, which removes the carbonyl carbon and converts the amide into an amine.

    • So, C = aniline (C₆H₅NH₂), which matches the molecular formula C₆H₇N.

Final Conclusion:

  • The correct answer should be Aniline.

  • However, Aniline is not among the options listed.

  • Option 1: Benzamine is incorrect, as this is not a proper IUPAC name and is sometimes mistakenly used for benzylamine (C₆H₅CH₂NH₂), which has a different structure.

  • Correct answer is thus Option 4: None of the above, as none of the names match Aniline.