Answer
i. $O_{3}$: Polar
ii. $XeF_{2}$: Non-polar
iii. $NO_{2}$: Polar
iv. $C_{6}H_{14}$: Non-polar
Work Step by Step
i. It has a bent shape, hence there is a net dipole moment.
ii. It has a linear structure with 0 dipole moment.
iii. It has a bent shape due to lone pair of electrons, hence there is a dipole moment.
iv. There is no polarization in C-H bonds as the charges are balanced by each other.
