Which of the following dissolves in ionic solvents?

Which of the following has the maximum dipole moment?

Dipole moment of $HCl = 1.03 \ D$ and $HI = 0.38 \ D$. Bond length of $HCl = 1.3 \ \mathring{A}$ and $HI = 1.6 \ \mathring{A}$. The ratio of the fraction of electric charge,$\delta$,existing on each atom in $HCl$ and $HI$ is:

Arrange the following in order of increasing dipole moment: $H_2O, H_2S, BF_3$.

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

The dipole moment is zero for the molecule: