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NEET Sample Paper NEET Sample Test Paper-90

  • question_answer
    Mole fraction of methanol in its aqueous solution is 0.5. The concentration of solution in terms of percent by mass of methanol is

    A) 36                    

    B)        50   

    C) 64        

    D)         72

    Correct Answer: C

    Solution :

    [c] Mass of methanol in 1 mol solution \[=0.5\times 32=16\,g\] Mass of water in solution \[=0.5\times 18=9\,g\] % by mass of methanol \[=\frac{16\times 100}{16+9}=64\]


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