Which of the following statements about resonance is not correct?

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The different resonance structures of a molecule have fixed arrangement of atomic nuclei

The different resonance structures of a molecule should have same number of unpaired electrons

The hybrid structure has equal contribution from all the resonating structures

None of the individual resonating structures explains the various characteristics of the molecule

answer is C.

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Detailed Solution

→ In all the resonance structures the position of nuclei remains same.→ Number of unpaired electrons and number of paired electrons remains same in all the resonane strucutres.→ Different resonating structures contributes differenently towards the resonance hybrid.→ All the properties of a molecule not explained by single resonance structure.E.g: C – C bond length in benzene is explained by two resonance structures and not explained by any one of the resonance structure.

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