COMEDK2025ChemistryAminesActual
Choose the correct statement from the options given
Options
- ABenzene diazonium chloride when reacted with Aniline in presence of dil. HCl at 273 K yields ( C ₆ H 5- N = N
- BOn heating an aliphatic primary amine with ( CHCl ₃ ) in presence of Ethanolic KOH, a Nitrile is formed
- CThe intermolecular bonding in primary amines is stronger than in secondary amines.
- DThe decreasing order of basic nature of the following amines is: Methylamine (> ) Dimethylamine (> ) Trimethyl
Correct answer
C. The intermolecular bonding in primary amines is stronger than in secondary amines.
Step-by-step solution
(1) Incorrect: Coupling of benzene diazonium chloride with aniline yields p-aminoazobenzene ( H₂N-C₆H₄-N=N-C₆H₅ ), not the diazoaminobenzene structure shown. (2) Incorrect: Heating a primary amine with CHCl₃ and ethanolic KOH (carbylamine test) yields an isocyanide (carbylamine), not a nitrile. (3) Correct: Primary amines (R- NH₂ ) have two N-H bonds, enabling a more extensive intermolecular hydrogen bonding network. Secondary amines ( R₂NH ) have only one N-H bond, resulting in weaker intermolecular hydrogen bondi