Polarisation and Dipole Moment

If in a polar molecule, the ionic charge is ${\text{2.6 × 10}}^{\text{-10}}\text{ e.s.u.}$ and, the interionic distance is $0.8 \mathrm{\AA }$, then the dipole moment is_______. 

${\mathrm{H}}_2\mathrm{O}$ is dipolar, whereas ${\mathrm{BeF}}_{\mathrm{2}}$ is not. It is because _____.

The interatomic forces of attraction present in noble gas are ______.

Among the following, the molecule with the highest dipole moment is ______.

[IIT JEE (Screening) 2003]

Which of the following contains both polar and non-polar bonds?