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BHU PMT BHU PMT (Screening) Solved Paper-2009

  • question_answer
    Which of the following substances consists of only one element?

    A)  Marble                               

    B)  Sand

    C)   Diamond           

    D)  Glass

    Correct Answer: C

    Solution :

                     Diamond consists of only one element, ie, carbon. It is an allotrope of carbon. It is a hard, beautiful crystalline substance. It is the hardest substance known.


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