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NEET Sample Paper NEET Sample Test Paper-10

  • question_answer
    Relative lowering of vapour pressure of a dilute solution is \[0.2\]. What is the mole fraction of the non-volatile solute?

    A)  \[0.8\]                         

    B)  \[0.5\]

    C)  \[0.3\]                         

    D)  \[0.2\]

    Correct Answer: D

    Solution :

    According to Raoult's law the relative lowering- in vapour pressure of an ideal solution containing the non-volatile solute is equal to the mole fraction of the solute \[\because \]relative lowering of vapour pressure \[=0.2\] mole fraction of the solute \[=0.2\]


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