Question

    Which one of the following is not an iron ore?

    A Hematite Correct Answer Incorrect Answer
    B Magnetite Correct Answer Incorrect Answer
    C Anthracite Correct Answer Incorrect Answer
    D Siderite Correct Answer Incorrect Answer

    Solution

    The most widely distributed iron-bearing minerals are oxides, and iron ores consist mainly of hematite (Fe2O3), which is red; magnetite (Fe3O4), which is black; limonite or bog-iron ore (2Fe2O3·3H2O), which is brown; and siderite (FeCO3), which is pale brown. Anthracite is a type of coal .

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