Classify the following molecules into Polar and non-polar. `(H_2O, H_2, NH_3, N_2, CO_2, CO, HCI, O_2)`
b. Define polar and non-polar molecules.
c. Whar is meant by dielectric polarization?

Explanation

Polar molecules `H_2O, NH_3, CO, HCl`
Non-polar molecules : `H_2, N_2, CO_2, and O_2`
b. Refer Section 2.10.1
c. Adielectric material, polar or non-polar, when placed in an electric field `E_0` the dipoles get aligned parallel to the field. The dielectric material set up a secondary electric field `E_p` of its own in a direction opposite to the applied field `E_0`. This phenomenon is known as dielectric polarization. The net field strength gets reduced and is given as `E=E_0-E_P`
Definition: The alignment of dipole moment of permanent or induced dipoles of a dielectric in an external electric field is called dielectric polarization.