JEE Main · 2024 · 27 Jan 2024 · Shift 1 · Chemical Bonding and Molecular Structure

$\mathrm{CC}{\mathrm{l}}_4$ (tetrahedral, identical bonds), $\mathrm{C}{\mathrm{O}}_2$ (linear) and $\mathrm{C}{\mathrm{H}}_2=\mathrm{C}{\mathrm{H}}_2$ (planar and symmetric) all have their bond dipoles cancel exactly, so each is non-polar. $\mathrm{CHC}{\mathrm{l}}_3$ is tetrahedral but has one C–H bond and three C–Cl bonds; these dipoles do not cancel, leaving a net dipole moment. $\mathrm{CHC}{\mathrm{l}}_3$ is the polar molecule.