Identify the non-polar molecule in the set of compounds given: $HCl, HF, H_2, HBr$.

Explain the dipole moment of $AB_2$ linear molecules (e.g.,$BeF_2$) and $AB_2$ angular molecules (e.g.,$H_2O$).

Which of the following has the highest dipole moment?

Explain the dipole moment of a triatomic molecule $(AB_2)$.

Write the significance/applications of dipole moment.

$A$ diatomic molecule has a dipole moment of $1.2 \, D$. If its bond length is equal to $10^{-10} \, m$,then the fraction of an electronic charge on each atom will be .............. $\%$