Q 2810423319.     Which one of the following statements is not correct for sigma - and pi- bonds formed between two carbon atoms?

AIPMT 2003
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 `347` 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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