Question

Identify the compound, which has maximum number of no bond resonance structures

• A.
• B.
• C.
• D.

Answer 1

Answer: (D)

More be the H-atoms associated (bonded) with the C-atom, which is bonded with the benzene ring, more will be the number of 'no bond resonance' structures shown by them.

In structure (a)



the $C$-atom associated with the ring has no $H$-atom.

In structure (b)



the $C$-atom bonded with the ring has $2H$-atoms.

In structure (c)



the $C$-atom bonded with the ring has one $H$-atom.

In structure (d)



the $C$ - atom bonded with the ring has $3H$ - atoms