JEE Main & Advanced Chemistry Solutions / विलयन Question Bank Critical Thinking Solutions

  • question_answer
    \[0.6\,g\] of a solute is dissolved in \[0.1\,litre\] of a solvent which develops  an osmotic pressure of 1.23 atm at \[{{27}^{o}}C\]. The molecular mass of the substance is       [BHU 1990]

    A)                 \[149.5\,g\,mol{{e}^{-1}}\]              

    B)                 \[120\,g\,mol{{e}^{-1}}\]

    C)                 \[430\,g\,mol{{e}^{-1}}\]

    D)                 None of these

    Correct Answer: B

    Solution :

                \[m=\frac{wRT}{PV}=\frac{0.6\times 0.082\times 300}{1.23\times 0.1}=120\]


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