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  1. Magnetite is

    2. A.

     Fe2O3
    B.

     Fe3O4
    C.

     FeCO3
    D.

     2Fe2O3. 3H2O

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    Answer : Option B

    Explanation :

    Magnetite is a rock mineral and one of the main iron ores, with the chemical formula Fe₃O₄.

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