Instructions

For each question, enter the correct numerical value (in decimal notation, truncated/rounded-off to the second decimal place; e.g. 6.25, 7.00, -0.33, -.30, 30.27, -127.30) using the mouse and the on-screen virtual numeric keypad in the place designated to enter the answer.

Question 30

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 vapour pressure 45 Torr. At the same temperature, a new solution of A and B having mole fractions $$x_{𝐴} and x_{𝐵}$$, respectively, has vapour pressure of 22.5 Torr. The value of $$\frac{x_{A}}{x_{B}}$$ in the new solution is ____.
(given that the vapour pressure of pure liquid A is 20 Torr at temperature T)

Correct Answer: e

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