Question

(A) Antiferromagnetic substances possess zero magnetic moment.
(R) MnO is an antiferromagnetic substance.

• A. Both (R) and (A) are true but reason is not correct explanation of assertion.
• B. Both (R) and (A) are true but reason is not Assertion (A) is true but reason (R) is false.
• C. Assertion (A) is true but reason (R) is false
• D. Assertion (A) and reason (R) both are false
• E. Assertion (A) is false but reason (R) is true

Answer 1

The correct option is A Both (R) and (A) are true but reason is not correct explanation of assertion.

Anti-ferromagnetic substances possess zero magnetic moment as there are no unpaired electrons. $MnO$ is an anti-ferromagnetic substance.

So both (R) and (A) are true but reason is not correct explanation of assertion.

hence option A is correct.