Question

Select the basic strength order of following molecules.
(I)
(II)(III)

• A.
  $III>II>I$
• B.
  $II>III>I$
• C.
  $I>III>II$
• D.
  $III>I>II$

Answer 1

The correct option is A

$III>II>I$
Since in (III) lone pair is only involved in delocalisation, in (II) nitrogen is attached to the carbonyl (withdrawing group) and one alkyl group (donating group +I effect) which have the more basic character than the (I) in which N atom is attached to the two withdrawing groups i.e benzene and carbonyl. Hence correct basicity order is $III>II>I$