2nd Class Science Rocks and Soil Question Bank Rock and Minerals

  • question_answer Which of the following rocks on burning, produces heat and electricity?

    A)  Graphite

    B)                         Granite               

    C)         Coal                     

    D)         Gypsum

    Correct Answer: C

    Solution :

    Coal on burning produces heat and electricity. Heat changes water into steam in steam engines.

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