Assertion (A) : Non-polar amterials do not have my permanent dipole moment.
Reason (R) : When an non-polar material is placed in a electric field. the centre of the positive charge distribution of it's individual atom or molecule coinsides with the centre of the negative charge distribution.
In the light of above statements, choose the most appropriate answer from the options given below.
Reason (R) : When an non-polar material is placed in a electric field. the centre of the positive charge distribution of it's individual atom or molecule coinsides with the centre of the negative charge distribution.
In the light of above statements, choose the most appropriate answer from the options given below.
- (A)Both (A) and (R) are correct and (R) is the correct explanation of (A).
- (B)Both (A) and (R) are correct and (R) is not the correct explanation of (A).
- (C)(A) is correct but (R) is not correct.✓ Correct
- (D)(A) is not correct but (R) is correct.
Answer: (C)
Solution
Assertion (A) is correct: non-polar materials have no permanent dipole moment because the centers of positive and negative charge distributions coincide in the absence of an external field. Reason (R) is incorrect: when a non-polar material is placed in an external electric field, the centers of positive and negative charges separate (induced polarization), creating an induced dipole moment. The statement in (R) describes the situation without an external field, not with one.
JEE Main · 2022 · 26 Jun 2022 · Shift 1 · Single correct option