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NEET Chemistry Solutions / विलयन Question Bank Self Evaluation Test - Solutions

  • question_answer
    The relationship between osmotic pressure at 273 K when 10g glucose \[\left( {{P}_{1}} \right)\], 10g urea \[\left( {{P}_{2}} \right)\], and 10 g sucrose \[\left( {{P}_{3}} \right)\] are dissolved in 250 mL of water is

    A) \[{{P}_{1}}>{{P}_{2}}>{{P}_{3}}\]              

    B) \[{{P}_{3}}>{{P}_{1}}>{{P}_{3}}\]

    C) \[{{P}_{2}}>{{P}_{1}}>{{P}_{3}}\]             

    D) \[{{P}_{2}}>{{P}_{3}}>{{P}_{1}}\]

    Correct Answer: C

    Solution :

    [c] Moles of glucose \[\frac{10}{180}=0.05,\] \[urea=\frac{10}{60}=0.16,\text{ }Sucrose=\frac{10}{342}=0.029\] Hence osmotic presure \[{{P}_{2}}>{{P}_{1}}>{{P}_{3}}(\pi \propto C)\]


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