NTA Abhyas JEE Main2020ChemistryBiomoleculesPractice
Pick out the correct statement.
Options
- ABoth glycine and p-aminobenzoic acid form dipoler ions
- BBoth sulphanilic acid and p-aminobenzoic acid form dipolar ions
- CGlycine does not form dipolar ion, but p-aminobenzoic acid forms dipolar ion
- DBoth sulphanilic acid and glycine form dipolar ions, but p-aminobenzoic acid does not form dipolar ion
Correct answer
D. Both sulphanilic acid and glycine form dipolar ions, but p-aminobenzoic acid does not form dipolar ion
Step-by-step solution
The aliphatic - N H 2 is sufficiently basic to accept H + from - C O O H group in glycine, N H 2 C H 2 C O O H . The - C O O H is not strong enough to donate H + to the weakly basic aromatic N H 2 in p-aminobenzoic acid, The - S O 3 H is a sufficiently strong acid to donate H + to weakly basic aromatic N H 2 .