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12th Class Chemistry Solutions / विलयन Question Bank MCQs - Solutions

  • question_answer
    What will be the molality of a solution of glucose in water which is 10% w/W?

    A) 0.01m

    B) 0.617m

    C) 0.668m

    D) 1.623m

    Correct Answer: B

    Solution :

    Mass of solution = 100 g Mass of glucose = 10 g, Mass of water = 90 g No. of moles of glucose = \[\frac{10}{180}\]= 0.0555 mol No. of moles of water = \[\frac{90}{18}\] =5 mol Molality=\[\frac{No.\,of\,moles\,of\,solute}{Mass\,of\,solvent\,in\,kg}=\frac{0.0555\,mol}{0.090\,kg}\] = 0.617m


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