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The plot of total vapour pressure as a function of mole fraction of the components of an ideal solution formed by mixing liquids X and Y is

Correct answer

1

Step-by-step solution

According to Raoult's law, p = p 0 χ According to Dalton's law of partial pressure, p T = p x + p y p T = p 0 xχ x + p 0 yχ y = p 0 xχ x + p y 0 1 - χ x p T = p 0 Y + p 0 x - p 0 y χ x Thus, total vapour pressure of solution varies linearly with mole fraction of component X . Case I , at χ X = 0 p T = p 0 Y Case II , at X X = 1 p T = p 0 Y + p 0 X - p 0 Y p T = p X 0

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