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JEE Main levelSingle correct optionDifficulty 2 of 3ss031

Which pairing of substance and magnetic behaviour is correct?

A $Fe X_{3} O X_{4}$ - ferrimagnetic
B $MnO$ - ferrimagnetic
C $CrO X_{2}$ - antiferromagnetic
D $NaCl$ - ferromagnetic

Answer: A

Fe X_{3} O X_{4}

has unequal magnetic moments aligned antiparallel, giving net moment (ferrimagnetism).

CrO X_{2}

is ferromagnetic,

MnO

is antiferromagnetic and NaCl is diamagnetic.

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