Find the total number of compounds having non-zero dipole moment. 1,4-cyanobenzene, 1,4-dihydroxybenzene, 1,4-dichlorobenzene, ${\mathrm{H}}_2{\mathrm{O}}_2,{\mathrm{O}}_2{\mathrm{F}}_2,{\mathrm{Cl}}_2{\mathrm{O}}_2,{\mathrm{PF}}_2{\mathrm{Cl}}_3,{\mathrm{PF}}_3{\mathrm{Cl}}_2,{\mathrm{CHCl}}_3,{\mathrm{SF}}_6,{\mathrm{XeF}}_4,{\mathrm{NO}}_2,{\mathrm{SO}}_2$

The individual bond dipole moments of Benzene 1,4-dihydroxy, ${\mathrm{H}}_2{\mathrm{O}}_2,{\mathrm{O}}_2{\mathrm{F}}_2,{\mathrm{Cl}}_2{\mathrm{O}}_2,{\mathrm{PF}}_3{\mathrm{Cl}}_2,{\mathrm{CHCl}}_3,{\mathrm{NO}}_2$ and $S{O}_2$ cancel one another, Hence there is no net dipole moment.

Hence, the total number of compounds having non-zero dipole moment is 8.