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JEE Main levelSingle correct optionDifficulty 2 of 3ss208

In a certain solid the magnetic moments of neighbouring ions are aligned in equal numbers in parallel and antiparallel directions, giving zero net magnetic moment. This type of magnetism is shown by

A $Cu$
B $Fe X_{3} O X_{4}$
C $CrO X_{2}$
D $MnO$

Answer: D

Equal and opposite alignment of neighbouring moments is antiferromagnetism, shown by

MnO

.

CrO X_{2}

is ferromagnetic,

Fe X_{3} O X_{4}

is ferrimagnetic and copper is diamagnetic.

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