Question

Which of the following statement is not correct for sigma and pi- bonds formed between two carbon atoms ?
A. Free rotation of atoms about a sigma bond is allowed but not in case of a pi-bond
B. Sigma bond determines the direction between carbon atoms but a pi-bond has no primary effect in this regard
C. Sigma bond is stronger than a pi-bond
D. Bond energies of sigma and pi-bonds are of the order of 264 kJ/mol and 347 kJ/mol respectively.

Answer 1

Correct Answer - D
Bond energy of sigma bond is greater than pi bond, thus their energies between C-atoms are `347 kJ mol^(-1)` and 264 kJ/mol respectively.