Given below two statements : One is labelled as Assertion (A) and other is labelled as Reason (R).

Assertion (A) : Non-polar materials do not have any permanent dipole moment.

Reason (R) : When a non-polar material is placed in an electric field, the centre of the positive charge distribution of it's individual atom or molecule coincides with the centre of the negative charge distribution.

In the light of above statements, choose the most appropriate answer from the options given below.

CONCEPT:

Polar molecules - Polar molecules are defined as the formation of molecules in which one end is made up of the positive charge and the other end is having an opposite charge which is a negative charge.

For example - Glucose, water, etc.

Non-Polar molecules - Non-Polar molecule is defined as the formation in which the ends do not have any charge present due to the reason that the electron is finely distributed and those which symmetrically cancel out with each other.

For example - Fats, petrol, etc.

EXPLANATION:

As we know, a Non-Polar molecule is defined as the formation in which the ends do not have any charge present due to the reason that the electron is finely distributed and those which symmetrically cancel out with each other.

Therefore, the Center of the positive charge coincides with the center of the negative charge and cancels each other, and does not have any permanent dipole moment.

Hence A) is correct.

When the non-polar molecular is in the electric field the center does not coincide and they are having a non-zero moment.

Therefore, (R) is not correct.

Hence option 3) is the correct answer.