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

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Passivity of iron is due to the formation of thin film of….on its surface.
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Correct option: A
Oxide
Option A (Oxide) is correct because the passivity of iron is due to the formation of a thin, protective layer of iron oxide (Fe2O3Fe_2O_3 or Fe3O4Fe_3O_4) on its surface, preventing further corrosion.

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