Statement - I : ${Fe}_{3} O_{4}$ is ferrimagnetic at 298K but becomes paramagnetic at 850 K
Statement - II : The magnetic moments in ${Fe}_{3} O_{4}$ are aligned equally in parallel and antiparallel directions which on heating randomise.

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Both statements I and II are correct

Statement-I is incorrect and statement-II is correct

Both statements I and II are incorrect

Statement-I is correct and statement-II is incorrect

answer is C.

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Detailed Solution

Fe₃O₄ ions are unequal in magnitude and aligned in antiparallel direction.
But when heated at 850 K, the arrangement randomized and the substance becomes paramagnetic.

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