In a mixture of closely related liquids (such as benzene and toluence), the Roult's law states that theratio P_(A) is proportional to the mole fraction of A in the liquid, P_(A)x_(A). Mixtures that obey the law throughout thecomposition ranges from pure A to pure B are called ideal solutions . In ideal solution thesolute also obeys Roult's law . Then the total pressure is given by P_("total")=P_(A)^(0)x_(A)+P_(B)^(0)x_(B)Benzeneand toluene froms nearly an ideal solution in which the mole fraction of the benzene is 0.4 . Ifv.p. of pure benzene is 40 mmHg and toluene is 30 mmHg at a given temperature , then what is the fraction of toluene in the vapour phase?

In a mixture of closely related liquids (such as benzene and toluence)

1.	In a mixture of closely related liquids (such as benzene and toluence), the Roult's law states that theratio P_(A) is proportional to the mole fraction of A in the liquid, P_(A)x_(A). Mixtures that obey the law throughout thecomposition ranges from pure A to pure B are called ideal solutions . In ideal solution thesolute also obeys Roult's law . Then the total pressure is given by P_("total")=P_(A)^(0)x_(A)+P_(B)^(0)x_(B)Benzeneand toluene froms nearly an ideal solution in which the mole fraction of the benzene is 0.4 . Ifv.p. of pure benzene is 40 mmHg and toluene is 30 mmHg at a given temperature , then what is the fraction of toluene in the vapour phase?
Answer» 0.6 0.47 0.53 0.74 Answer :C