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9th Class Science Sample Paper Science Olympiad Model Test Paper-20

  • question_answer
    Which of the following is not a characteristic of pure substances?                              

    A) A pure substance contains only one type of   particles.     

    B) A pure substance has definite composition.

    C) A pure substance may be homogeneous or heterogeneous,                         

    D) A pure substance has definite melting and boiling point.                            

    E) None of these

    Correct Answer: C

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