Chemistry - CHEMICAL BONDING Question with Solution | TestHub

The internuclear axis is the Z-axis.

A. $p_x+p_x$ overlap along the Z-axis forms a $\pi$ bond, not a $\sigma$ bond. A $\sigma$ bond would form from $p_z+p_z$ overlap.

B. $d_{x^2-y^2}+d_{xy}$ overlap does not form a $\delta$ bond. $\delta$ bonds require face-to-face overlap of four lobes, typically $d_{xy}+d_{xy}$ or $d_{x^2-y^2}+d_{x^2-y^2}$.

C. $d_{yz}+d_{yz}$ overlap along the Z-axis results in a $\pi$ bond. The lobes overlap sideways above and below the internuclear axis. This is correct.

D. $d_{xz}+d_{xz}$ overlap along the Z-axis forms a $\pi$ bond, not a $\delta$ bond.

Therefore, option C is the correct match.