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Which of the following statements is incorrect for sigma and \( \pi \)-bonds formed between two carbon atoms?
(a) Sigma-bond is stronger than a \( \pi \)-bond
\( \mathrm{P} \)
(b) Bond energies of sigma and \( \pi \)-bonds are of the order of \( 264 \mathrm{~kJ} / \mathrm{mol} \) and \( 347 \mathrm{~kJ} / \mathrm{mol} \)
W
(c) Free rotation of surrounding 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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