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

  • question_answer
    In a mixture  of 1 gm \[{{H}_{2}}\] and 8 gm \[{{O}_{2}}\], the mole fraction of hydrogen is                                 [Orissa JEE 2002]

    A)             0.667     

    B)                 0.5

    C)                 0.33       

    D)                 None of these

    Correct Answer: A

    Solution :

              Mole fraction \[=\frac{n}{n+N}=\frac{\frac{w}{m}}{\frac{w}{m}+\frac{W}{M}}\]                \[=\frac{\frac{1}{2}}{\frac{1}{2}+\frac{8}{32}}=0.667\].


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