Which of the following liquids is not deflected by a non-uniform electrostatic field?

Arrange the following compounds in increasing order of their dipole moment :
$HBr$,$H_2S$,$NF_3$ and $CHCl_3$

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:

Which carbonyl compound has the maximum dipole moment?

$A$ covalent molecule $XY$ is found to have a dipole moment of $1.5 \times 10^{-29} \ C \cdot m$ and a bond length of $150 \ pm$. The percent ionic character of the bond will be (in $\%$)

Which of the following molecules has a dipole moment of zero: $NH_3, PH_3, BH_3, AlH_3$?