COMEDK202510 May 2025Evening ShiftChemistryAminesActual
Choose the correct statement:
Options
- AAnilinium ion is less resonance stabilised than Aniline.
- BAliphatic amines are weaker bases than NH ₃ while aromatic amines are stronger bases than NH ₃ .
- CSec-butylamine is optically inactive because Nitrogen atom of the - NH ₂ group is achiral.
- DGabriel phthalimide synthesis is used for preparing both Ethyl amine and Aniline.
Correct answer
A. Anilinium ion is less resonance stabilised than Aniline.
Step-by-step solution
(1) Correct: In aniline ( C₆H₅NH₂ ), the lone pair on N is delocalized into the benzene ring, forming multiple resonance structures. In the anilinium ion ( C₆H₅NH₃^+ ), the lone pair is donated to a proton and can no longer participate in resonance. Hence anilinium ion is less resonance stabilised than aniline. (2) Incorrect: Aliphatic amines are stronger bases than NH₃ due to the +I effect of alkyl groups. Aromatic amines are weaker bases than NH₃ because their lone pair is delocalized into the benzene ring. (3) I