Which of the following is non-polar?

The order of dipole moments of $H_2O (A)$,$CHCl_3 (B)$,and $NH_3 (C)$ is

Match the following molecules in List-$I$ with their respective dipole moments in List-$II$.

List-$I$ (Molecules)	List-$II$ (Dipole moment)
$A$. $HBr$	$I$. $1.04$
$B$. $H_2S$	$II$. $0$
$C$. $NH_3$	$III$. $0.79$
$D$. $CHCl_3$	$IV$. $0.95$
	$V$. $1.47$

Which one of the following has the highest dipole moment?

Which among the following statements is $NOT$ correct about the dipole moment of $NH_3$ and $NF_3$?

If the bond length and dipole moment of a diatomic molecule are $1.25 \ \mathring{A}$ and $1.0 \ D$ respectively,what is the percent ionic character of the bond?