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9th Class Science Matter in Our Surroundings Question Bank 9th CBSE Science Matter in Our Surroundings

  • question_answer
      The mass per unit volume of a substance is called density (density =     mass/volume). The following in order of increasing density?air, exhaust from chimneys, honey, water, chalk, cotton and iron.                                          [NCERT]

    Answer:

                   Increasing order of density: Air < exhaust from chimneys < cotton < chalk < water < honey < iron


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