9th Class Science Is Matter Around Us Pure Question Bank 9th CBSE Science Is Matter Around Us Pure

  • question_answer
      Give reasons (i) Path of beam of light is not visible through a solution. (ii) Particles of suspension can be seen with a naked eye.

    Answer:

                      (i) Path of beam of light is not visible through a true solution because particles of a true solution do not scatter light while colloidal particles scatter light.                                     (1) (ii) Size particles of suspension is greater than     100 nm. So, they can be seen with a naked eye.                                                                    (1)


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