Question

Which of the following bond has the highest bond energy?

• A. $\sigma$-bond
• B. $\pi$-bond
• C. Hydrogen bond
• D. Metallic bond

Answer 1

The correct option is A $\sigma$-bond

The reason behind sigma bonds being the strongest is the orientation of the overlapped orbitals. Sigma bonds result from head-on (co-axial) overlapping while pi bonds are the outcome of lateral (Para-axial) overlapping. Here is a pictorial representation of ethene (${sp}^2$ hybridized C atoms.):

The greater the extent of overlapping the higher the probability of finding the valence electrons in between the nuclei and hence bond will be stronger and shorter.