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AMU Medical AMU Solved Paper-1996

  • question_answer
    An aqueous solution of sucrose,\[{{C}_{12}}{{H}_{22}}{{O}_{11}},\] containing 34.2 g/1 has an osmotic pressure of 2.38 atmospheres at\[17{}^\circ C\]for an aqueous solution of glucose,\[{{C}_{6}}{{H}_{12}}{{O}_{6}}\]to be isotonic with this solution, it would have

    A)  34.2 g/1           

    B)  17.1 g/1

    C)  18.0 g/1           

    D)  36.0 g/1 of glucose

    Correct Answer: C

    Solution :

    : Osmotic pressure\[=\frac{nRT}{V}=CRT\] For isotonic solutions, osmotic pressure of sucrose = osmotic pressure of glucose \[\therefore \] At constant temperature, \[{{n}_{1}}={{n}_{2}}\] \[\Rightarrow \] \[\frac{34.2}{342}=\frac{{{w}_{2}}}{180}\Rightarrow {{w}_{2}}=18g/L\]


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