The vapour pressures of the pure components P and Q are 700 Torr and 500 Torr...

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The vapour pressures of the pure components P and Q are 700 Torr and 500 Torr...

The vapour pressures of the pure components P and Q are 700 Torr and 500 Torr respectively. When the two phases are in equilibrium at 1.0 atm, the mole fraction of P in the liquid phase is 0.6 and in the

vapour phase 0.4. The activity co-efficient of compound P in the solution on the basis of Raoult’s law is

(a) 0.60 (b) 0.72

(c) 0.92 (d) 1.01

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