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Question

'CC' bond length in benzene lies between single and double bond.The reason is


A

Resonance

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B

Isomerism

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C

Metamerism

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D

Inductive effect

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Solution

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 'CC' bonds are of 140 pm long.

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

Resonance Hybrid of Benzene is

Partial double bond on each carbon


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