Among the following molecules, which one has a non-zero dipole moment?

Step-by-step solution

The dipole moment of a molecule depends on its geometry and the vector sum of individual bond dipoles and lone pair dipoles. In XeF ₄ , the central xenon atom has 4 bond pairs and 2 lone pairs. Its geometry is square planar, which is highly symmetrical. The bond dipoles and lone pair dipoles cancel each other out, resulting in a net dipole moment of zero. In PCl ₅ , the central phosphorus atom has 5 bond pairs and 0 lone pairs. Its geometry is trigonal bipyramidal. The three equatorial P-Cl bond dipoles cancel each