NTA Abhyas JEE Main2020ChemistryBiomoleculesPractice
Pick out incorrect statement
Options
- AIn a electrolysis experiment, α -amino acids migrate at the isoelectric point towards electrodes
- Bp-aminobenzenesulphonic acid as a dipolar ion; while p-aminobenzoic acid does not
- CSulphanilic acid is soluble in base, but not in acid
- DH 3 N + C H 2 C O O H is more acidic than R C H 2 C O O H
Correct answer
A. In a electrolysis experiment, α -amino acids migrate at the isoelectric point towards electrodes
Step-by-step solution
A. The pH at which Anion = Cation is called isoelectric point. At isoelectric point, α -amino acids do not migrate when electric field is applied. B. - S O 3 H is strongly acidic and donates H + to weakly basic arylamino group. ArCOOH is not acidic enough to transfer H + to the arylamino group. C. In p - H 3 N + C 6 H 4 S O 3 , H 3 N + is acid enough to transfer H + to bases to give the soluble anion, p - H 2 N - C 6 H 4 S O 3 . - S O 3 is too feebly basic and cannot accept H + from acids. D. α - H 3 N + group incr