question_answer

  Arrange the following (i) In increasing order of basic strength aniline, p-nitro aniline and p-toluidine. (ii) In increasing order of solubility in water.                                                [1+1]

Answer:

  (i) ?is electron-withdrawing group, decreases electron-density at N in ? hence (A) less basic than aniline. ? is electron-donating group increases electron density at N in ?hence (C) more basic than aniline. (ii) As alkyl/aryl part (hydrophobic part) increases solubility decreases. Solubility of 2° amine is less than that of 1 ° amine.