Manipal Medical Manipal Medical Solved Paper-2010

  • question_answer
    If the elevation in boiling point of a solution of 10 g of solute (mol. wt. =100) in 100 g of water is\[\Delta {{T}_{b}},\]the ebullioscopic constant of water is

    A)  10

    B)  \[100{{T}_{b}}\]

    C)  \[\Delta {{T}_{b}}\]

    D)  \[\frac{\Delta {{T}_{b}}}{10}\]

    Correct Answer: C

    Solution :

     Molecular wt., \[m=\frac{1000\times {{k}_{b}}\times w}{W\times \Delta {{T}_{b}}}\] Or \[\Delta {{T}_{b}}=\frac{1000\times {{k}_{b}}\times w}{W\times m}\] \[\Delta {{T}_{b}}=\frac{1000\times {{k}_{b}}\times 10}{100\times 100}\] \[\Delta {{T}_{b}}={{k}_{b}}\]


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