Which of the following mixed halide molecules possesses a net dipole moment strictly equal to zero? — Chemical Bonding Chemistry Question

💡 Solution & Explanation

In trigonal bipyramidal geometry ($sp^3d$), more electronegative atoms prefer axial sites (Bent's Rule). In $PCl_3F_2$, the two F atoms are purely axial (canceling each other), and the three Cl atoms are purely equatorial (canceling each other), making $\mu = 0$.