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JEE Main & Advanced Chemistry Solutions / विलयन Question Bank Method of expressing concentration of solution

  • question_answer
    36g water and 828g ethyl alcohol form an ideal solution. The mole fraction of water in it, is     [MP PMT 2003]

    A)                 1.0         

    B)                 0.7

    C)                 0.4         

    D)             0.1

    Correct Answer: D

    Solution :

           \[N=\frac{W}{M}=\frac{828}{46}=18,\,n=\frac{w}{m}=\frac{36}{18}=2\]                                 \[{{x}_{{{H}_{2}}O}}=\frac{n}{n+N}\]\[=\frac{2}{2+18}=\frac{2}{20}=0.1\]


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