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CMC Medical CMC-Medical Ludhiana Solved Paper-2007

  • question_answer
    100 cc of 1.5% solution of urea is found to have an osmotic pressure of 6.0 atm and 100 cc of 3.42% solution of sugar cane is found to have an osmotic pressure of 2.4 atm. If the two solutions are mixed, the osmotic pressure of the resulting solution will be

    A)  8.4 atm                               

    B)  4.2 atm

    C)  16.8 atm                             

    D)  2.1 atm

    Correct Answer: B

    Solution :

                     On mixing, the concentrations are reduced to half of the original values. So osmotic pressures also become half. i.e.,        \[{{P}_{urea}}=3.0\,atm,\] \[{{P}_{cane\,\,sugar}}=1.2\,atm\] Total = 4.2 atm


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