Liquids A and B have vapour pressures pA and  pB, respectively, with pA>pB. These liquids from an ideal solution. If xA and yA are mole fractions of A in liquid and vapour phases then the slope of

  1. A

    the linear plot of yA versus xA is positive

  2. B

    he linear plot of yA versus xA is negative

  3. C

    the linear plot of 1/yA versus 1/xA is positive

  4. D

    the linear plot of 1/yA versus 1/xA is negative

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    Solution:

    The slope of the the linear plot of 1/yA versus 1/xA is positive when pA>pB.

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