If po and ps are vapour pressures of the solvent and solution respectively, n1 and n2 are the mole fractions of solvent and solute respectively, then

If po and ps are vapour pressures of the solvent and solution respectively, n1 and n2 are the mole fractions of solvent and solute respectively, then

  1. A

    ps=pon1

  2. B

    ps=pon2

  3. C

    po=psn2

  4. D

    ps=pon1n2

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    Solution:

    From Raoult's law,
                       po-Pspo=n2     1-pspo=n2 pspo=1-n2=n1 ps=n1×po

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