At 60° C, vapour pressure of methanol and water are 84.562 kPa and 19.953 kPa r

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At 60° C, vapour pressure of methanol and water are 84.562 kPa and 19.953 kPa respectively. An aqueous solution of methanol at 60° C exerts a pressure of 39.223 kPa; the liquid phase and vapour phase mole fractions of methanol are 0.1686 and 0.5714 respectively. Activity co-efficient of methanol is

Options:

A . 1.572

B . 1.9398

C . 3.389

D . 4.238

Answer: Option A

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