Question

'$C-C$' bond length in benzene lies between single and double bond.The reason is

• A. Resonance
• B. Isomerism
• C. Metamerism
• D. Inductive effect

Answer 1

The correct option is A

Resonance

Some of the characteristics of resonance are:

(i) It gives identical bonding (concept of partial double bond in resonance hybrid) and hence identical bond length. For example, in benzene, all '$C-C$' bonds are of 140 pm long.

(ii) It leads to the shortening of single '$C-C$' or other bonds in resonance hybrid.

Resonance Hybrid of Benzene is

Partial double bond on each carbon