Which of the following is a non-polar solvent?

Which of the following would have a permanent dipole moment?

The geometry and dipole moment of $H_2S$ respectively are

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

Which of the following compounds possesses a dipole moment?

Consider the following:
Assertion $(A)$: Dipole moment of $NF_3$ is lesser than $NH_3$.
Reason $(R)$: In $NF_3$,the orbital dipole due to lone pair of electrons is in the opposite direction to the resultant dipole moment of the three $N-F$ bonds.
The correct answer is: