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Which statement is NOT correct?

1. A sigma bond is weaker than a π-bond.
2. A sigma bond is stronger than a π-bond.
3. A double bond is stronger than a single bond.
4. A double bond is shorter than a single bond.

Correct answer: A sigma bond is weaker than a π-bond.

Solution

A sigma bond is stronger than a π-bond because it involves head-on overlap of orbitals, which is more effective than the side-on overlap in a π-bond. Thus, option A is incorrect.

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