Q.

The vapour pressure of the solution of two liquids A(po=80 mm) and B(po=120 mm) is found to be 100 mm when XA=0.4. The result shows that

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solution exhibits ideal behaviour

solution shows positive deviations

solution shows negative deviations

solution will show positive deviations for lower concentration and negative deviations for higher concentrations.

answer is C.

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Detailed Solution

PTotal =0.4×80+0.6×120PTotal =104>100 mm of Hg

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