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

  • question_answer
      The teacher instructed three students 'A', 'B' and 'C' respectively prepare a 50% (mass by volume) solution of sodium hydroxide NaOH in 'A' dissolved 50 g of NaOH in 100 mL of water, 'B' dissolved 50 g of NaOH in 100 g of water while 'C' dissolved 50 g of NaOH water to make 100 mL of solution. Which one of them has made the desired solution and why?                       [NCERT Exemplar]

    Answer:

         'C' has made the desired solution. Mass by volume per cent mass by volume


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