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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.
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B
Both (R) and (A) are true but reason is not Assertion (A) is true but reason (R) is false.
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C
Assertion (A) is true but reason (R) is false
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D
Assertion (A) and reason (R) both are false
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E
Assertion (A) is false but reason (R) is true
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Solution

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.

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