Vapour pressure of pure benzene is 119 torr and that of toluene is 37.0

Question:

Vapour pressure of pure benzene is 119 torr and that of toluene is 37.0 torr at the same temperature.

Mole fraction of toluene in vapour phase which is in equilibrium with a solution of benzene

and toluene having a mole fraction of toluene 0.50, will be :

  1.  0.137

  2. 0.205

  3. 0.237

  4. 0.435


Correct Option: , 3

Solution:

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