1. Tardigrade
  2. Question
  3. Chemistry
  4. 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)

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Q. 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)

AP EAMCETAP EAMCET 2018

Solution:

Correct answer is (b) 0.21