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Raoult's Law

Question 34 F...

Question

Question 34
For a binary ideal liquid solution, the variation in total vapour pressure versus composition of solution is given by which of the curves?

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Solution

(a, d)
Depending on the vapour pressures of the pure components 1 and 2, total vapour pressure over the solution decreases or increases with the increase of the mole fraction of component 1.

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For a binary ideal solution, the total pressure of the solution is given as

Q. Liquids A and B form ideal solution over the entire range of composition. At temperature T, equimolar binary solution of liquids A and B has a vapour pressure of 45 Torr. At the same temperature, a new solution of A and B having mole fractions

x_{A}

x_{B}

, respectively, has a vapour pressure of 22.5 Torr. The value of

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in the new solution is. (given that the vapour pressure of pure liquid A is 20 Torr at temperature T)

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