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EAMCET Medical EAMCET Medical Solved Paper-2009

  • question_answer
    Molality of an aqueous solution that produces an elevation in boiling point of 1.00 K at 1 atm pressure is (\[{{K}_{b}}\]for water\[=0.512\text{ }K\text{ }kg\text{ }mo{{l}^{-1}}\])

    A)  0.512 M              

    B)  0.195m

    C)  1.95m                                  

    D)  5.12 M

    Correct Answer: C

    Solution :

                     According to Raoulfs law,  \[\Delta {{\Tau }_{b}}={{K}_{b}}\times molality\]or \[\text{molality}=\frac{\Delta {{\Tau }_{b}}}{{{K}_{b}}}=\frac{1.00}{0.512}=1.95\,m.\]


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