question_answer 26)

  Amongst the following, the strongest base in aqueous medium is.............. (a)                       (b)                                (c)                   (d)

Answer:

                  (c) 2° Ainines are more basic than 1°, i.e.,  is more basic than  Due to -1-effect of CN group, is less basic than even is less basic than both  and due to delocalization of lone pair of electrons on the N-atom into the benzene ring.