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Q.
Rank the following compounds in order of increasing basic strength:
Amines
Solution:
$C _{6} H _{5} \overset{\underset{||}{O}}{C}NH _{2}$ is weakest base because of EW power of $( >C=O)$ group and resonance.
(3) Due to $(-M)$ of $NO _{2}$ and ortho effect it is weak base.
(2) Strong base lone pair is not involved in resonance.
