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JEE Main & Advanced Chemistry Solutions / विलयन Question Bank Mock Test - Solutions

  • question_answer
    Which of the given aqueous solution has the maximum boiling point? \[({{K}_{b}}\,of\,{{H}_{2}}O)=0.52{}^\circ \,mo{{l}^{-1}}kg),\,{{T}_{b}}({{H}_{2}}O)=373K)\]

    A) 6% urea solution by weight of solution

    B) 18% glucose solution by weight of solution

    C) 34.2% sucrose solution by weight of solution

    D) All have equal boiling points

    Correct Answer: C

    Solution :

    [c] \[\Delta {{T}_{b}}=\frac{1000{{K}_{b}}{{w}_{1}}}{{{m}_{1}}{{w}_{2}}}\] Boiling point of solution \[=(373+\Delta {{T}_{b}})\] The larger the value of \[\Delta {{T}_{b}}\], the higher the boiling point.
      \[{{w}_{1}}\] \[{{w}_{2}}\] \[{{m}_{1}}\] \[\Delta {{T}_{b}}\] Boiling point
    (1) 6.0g 94.0g 60 0.55 373.55K
    (2) 18g 82g 180 0.63 373.63K
    (3) 34.2g 65.8g 342 0.79 373.79K
     


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