NEET Biology Strategies for Enhancement in Food Production / खाद्य उत्पादन में वृद्धि के लिए रणनीतियाँ Question Bank Petroleum Coal and Gas

  • question_answer
    Each coal ball is a mass of

    A) Calcium carbonate

    B) Magnesium carbonate

    C) Iron sulphide

    D) All the above

    Correct Answer: D

    Solution :

    Not Available


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