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  3. 8th Class
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8th Class Science Sample Paper Science Olympiad Model Test Paper-17

  • question_answer
    Which one of the following statements about coal is incorrect?

    A) Coal is a combustible substance

    B) Coal mainly consists of carbon

    C) Coke is obtained by the destructive distillation of coal

    D) When coal is heated in air, it burns to produce mainly methane gas

    E) None of these

    Correct Answer: D

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