AP EAMCET Engineering 2018 Apr 23 Shift 1 Paper

Benzene and toluene form an ideal solution over the entire range of composition. Hie vapour pressure of pure benzene and toluene at T (K) are 50 mm Hg and 40 mm Hg respectively. What is the mole fraction of toluene in vapour phase when 117 g of benzene is mixed with 46 g of toluene ? (molar mass of benzene and toluene are 78 and 92 g mol−1 respectively)