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    Question

    Which of the following is an ore of calcium?

    A Dolomite Correct Answer Incorrect Answer
    B Gypsum Correct Answer Incorrect Answer
    C Calcite Correct Answer Incorrect Answer
    D All of the above Correct Answer Incorrect Answer

    Solution

    Calcium is commonly found in various ores such as dolomite (CaCOтВГ┬╖MgCOтВГ), calcite (CaCOтВГ), and gypsum (CaSOтВД┬╖2HтВВO). These minerals are essential sources of calcium in industrial and biological applications.

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