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

  • question_answer
    A solution containing 10.2 g glycerine per litre is isotonic with a 2% solution of glucose. What is the molecular mass of glycerine?

    A) 91.8 g

    B) 1198 g

    C) 83.9 g

    D) 890.3g

    Correct Answer: A

    Solution :

    \[{{\pi }_{glycerine}}={{\pi }_{glu\cos e}}\] \[\frac{{{n}_{1}}}{{{V}_{1}}}RT=\frac{{{n}_{2}}}{{{V}_{2}}}RT\] \[\frac{10.2}{M}\times \frac{1}{1}=\frac{2}{180}\times \frac{1000}{100}\] \[\Rightarrow M=\frac{10.2\times 18}{2}=91.8g\] (Density of water =\[1g/c{{m}^{3}}\])


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