Question

Rank the non-bonding electrons indicated by the arrows in order of their increasing energy:

• A. $C<B<A$
• B. $B<A<C$
• C. $A<B<C$
• D. $B<C<A$

Answer 1

The correct option is A $C<B<A$

Non bonding $e^{-}$ are participating in resonance in case 'C' and case 'B' and the strength of delocalisation is more for 'C'.
Where as for 'A' there is no resonance and we know, more is the extent of conjugation less will be the energy.
The correct increasing order of energy is:
$C<B<A$