9th Class Science Sample Paper Science Olympiad Model Test Paper-21

  • 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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