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JEE Main & Advanced Sample Paper JEE Main - Mock Test - 45

  • question_answer
    A solution of sucrose (molar mass\[=342\text{ }g\text{ }mol\]) is prepared by dissolving \[68.4\text{ }g\]of it per litre of the  solution, what is its osmotic pressure \[(r=0.082\,L\,atm\,{{K}^{-1}}\,mo{{l}^{-1}})\] at 273K

    A) \[6.02\,atm\]

    B)        \[4.48\,atm\]

    C) \[4.04\,atm\]

    D)        \[5.32\,atm\]

    Correct Answer: B

    Solution :

    \[\pi =CRT\] \[\pi =\frac{w\times R\times T}{mV}=\frac{68.4\times 0.0821\times 273}{342}=4.48atm\]


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