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

Which of the following substances has the highest dipole moment?

Observe the following list of molecules. The number of polar and non-polar molecules are respectively: $NH_3, BF_3, NF_3, H_2S, CO_2, CH_4, CHCl_3, H_2O$

Statement $I$: Dipole moment is a vector quantity and by convention it is depicted by a small arrow with tail on the positive centre and head pointing towards the negative centre.
Statement $II$: The crossed arrow of the dipole moment symbolizes the direction of the shift of charges in the molecules.
In the light of the above statements,choose the most appropriate answer from the options given below :-

Match the following molecules in List-$I$ with their respective dipole moments in List-$II$:
| List-$I$ (Molecules) | List-$II$ (Dipole moment $\mu$,$D$) |
| :--- | :--- |
| $A. \ H_2O$ | $I. \ 0$ |
| $B. \ BF_3$ | $II. \ 0.23$ |
| $C. \ NH_3$ | $III. \ 1.47$ |
| $D. \ NF_3$ | $IV. \ 1.85$ |

Write the significance/applications of dipole moment.