PA and PB are the vapour pressure of pure liquid components A and B respectively of an ideal binary solution .If XA represents the mole fraction of component A, the total vapour pressure solution will be

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PA+XA (PB-PA)

PA+XA (PA-PB)

PB+XA (PB-PA)

PB+XA (PA-PB)

answer is D.

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Detailed Solution

PT = XAPA+XBPBPT = XAPA+(1-XA)PB PT = PB+XA (PA-PB)

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