Which of the following sequences represents the correct decreasing order of bond strength for co-axi — Chemical Bonding Chemistry Question

💡 Solution & Explanation

According to VBT, directional orbitals undergo a greater extent of overlapping than non-directional orbitals. The $p$ -orbital is highly directional (concentrated along an axis), whereas the $s$ -orbital is spherically symmetrical (non-directional). Thus, $2p-2p$ overlaps most effectively, followed by $2s-2p$, and $2s-2s$ overlaps the least.