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JEE CHEMISTRY MCQ: GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

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Analyzing +4 | -1
Which of the following becomes paramagnetic on heating at 850 K850 \mathrm{~K} ?
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Correct option: D
(2) & (3) both
The correct answer is D because both Fe3O4 and ZnFe2O4, which are ferrimagnetic, become paramagnetic when heated to 850 K due to the randomization of spin alignment.

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