BHU PMT BHU PMT (Screening) Solved Paper-2011

  • question_answer
    The mole fraction of water in 20% aqueous solution of\[{{H}_{2}}{{O}_{2}}\]is

    A)  \[\frac{20}{80}\]                                             

    B)  \[\frac{80}{20}\]

    C)  \[\frac{68}{77}\]                                             

    D)  \[\frac{77}{68}\]

    Correct Answer: C

    Solution :

                     Mole fraction of water \[=\frac{\frac{80}{18}}{\frac{80}{18}+\frac{20}{34}}=\frac{68}{77}\]


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