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Which of the following statement is not ...

Which of the following statement is not correct for sigma and pi- bonds formed between two carbon atoms ?

A

Sigma-bond is stronger than a pi-bond

B

Bond energies of sigma- and pi-bonds are of the order of 264 kJ/mol and 317 kJ/mol, respectively

C

Free rotation of atoms about a sigma-bond is allowed but not in case of a pi-bond

D

Sigma-bond determines the direction between carbon atoms but a pi-bond has no primary effect in this regard

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