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

  • question_answer
    In a solution of \[7.8\,gm\] benzene \[{{C}_{6}}{{H}_{6}}\] and \[46.0\,gm\] toluene \[({{C}_{6}}{{H}_{5}}C{{H}_{3}})\], the mole fraction of benzene in this solution is                                               [BHU 1981, 87]

    A)                 \[1/6\]     

    B)                 \[1/5\]

    C)                 \[1/2\]     

    D)                 \[1/3\]

    Correct Answer: A

    Solution :

              Mole fraction at \[{{C}_{6}}{{H}_{6}}=\frac{\frac{7.8}{78}}{\frac{7.8}{78}+\frac{46}{92}}=\frac{1}{6}\].


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