SCIULIDIT. The vapour pressure of pure liquids A and B are 200 and 350 mm Hg respectively, at 300 K. Mole fraction of liquid A in a mixture having its vapour pressure 305 mm of Hg is 73. A

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let mole fration of iquid A in solution ( =x_{A} ) Mole frution of hiquid B in solution an NBW to find male proutions in rapour Mase we nane [ begin{array}{l} P_{A}=M_{A} P_{A}^{0}=0.3 times 200=60 mathrm{mm} P_{B}=x_{B} P_{B}=0.6 times 20000=210 mathrm{mm} end{array} ] Mole fration of in vapour phase ( =frac{270}{210}=0.77 )

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