The unequal sharing of bonded pair of electrons between two atoms in a molecule causes

Which of the following compounds has the least dipole moment?

If the dipole moment of chlorobenzene is $\mu$,what is the dipole moment of $1,3,5$-trichlorobenzene?

Bond distance in $HF$ is $9.17 \times 10^{-11} \ m$. Dipole moment of $HF$ is $6.104 \times 10^{-30} \ Cm$. The percentage ionic character in $HF$ will be : .............. $\%$
(electron charge $= 1.60 \times 10^{-19} \ C$)

Arrange the following compounds in the increasing order of their dipole moment.

Which of the following molecules has the most polar covalent bond?