Chemistry - CHEMICAL BONDING Question with Solution | TestHub

In-phase overlap of atomic orbitals leads to constructive interference → bonding MO, so (A) is correct.

Out-of-phase overlap leads to destructive interference → antibonding MO, so (B) is correct.

A σ bond has head-on overlap and allows rotation without loss of overlap, so (C) is incorrect.

A π bond has sidewise overlap, and rotation breaks overlap, so (D) is correct.