In benzene all the C-C bonds have the same length because of :
A
chain isomerism
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B
isomerism
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C
hybridisation
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D
resonance
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Solution
The correct option is B resonance In benzene, all C-C bond are of equal length and bond length is 1.39A0 due to delocalization of bonds, this is called resonance (delocalization of π electrons).