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    3. Chemistry Science
    4. Organic chemistry
    5. The gas that usually causes explosions in coal mines is

    Question

    The gas that usually causes explosions in coal mines

    is
    A Hydrogen Correct Answer Incorrect Answer
    B Carbon monoxide Correct Answer Incorrect Answer
    C Air Correct Answer Incorrect Answer
    D Methane Correct Answer Incorrect Answer

    Solution

    The correct answer is D

    Practice Next
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