9th Class Science Sample Paper Sample Paper - 1 Term - 1

  • question_answer 13) Define pure substance. Write its two characteristics.    

    Answer:

    A homogeneous material containing particles of only one kind and has definite properties throughout is called a pure substance.                                  Characteristics (i) A pure substance is always homogeneous in nature. (ii) It has a definite set of properties.                                                                                                                                                      (1)  


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