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  3. RAJASTHAN ­ PET

RAJASTHAN ­ PET Rajasthan PET Solved Paper-2006

  • question_answer
    According to Raoult's law, the relative lowering in vapour pressure of a solution is equal to

    A)  moles of solute

    B)  mole fraction of solvent

    C)  moles of solvent

    D)  mole fraction of solute

    Correct Answer: D

    Solution :

     According to Raoulfs law, the relative lowering of vapour pressure of solution is equal to mole fraction of solute. \[\frac{p-{{p}_{s}}}{{{p}_{s}}}={{X}_{B}}\] where, \[p=\]Vapour pressure of pure solvent \[{{P}_{s}}=\]Vapour pressure of solution \[{{X}_{B}}=\]Mole fraction of solute


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