Chemistry - CHEMICAL BONDING Question with Solution | TestHub

A. INCORRECT. $\mathrm{CHC}{\mathrm{l}}_3$ has a smaller dipole moment than $\mathrm{C}{\mathrm{H}}_2\mathrm{C}{\mathrm{l}}_2$ due to the vector sum of bond dipoles.

B. INCORRECT. $\mathrm{I}{\mathrm{F}}_5$ has a square pyramidal geometry with four F-I-F angles of approximately 82° and one of 90°.

C. CORRECT. ${\mathrm{C}}_2(\mathrm{CN}{)}_4$ has 9 $\sigma$ bonds and 9 $\pi$ bonds.

D. INCORRECT. Both $\mathrm{B}{\mathrm{F}}_3$ and $\mathrm{BC}{\mathrm{l}}_3$ are nonpolar molecules with zero net dipole moment, so they exhibit only London dispersion forces, not dipole-dipole interactions.