On adding solute to a solvent having vapour pressure 0.80 atm, vapour – McqOptions

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1.	On adding solute to a solvent having vapour pressure 0.80 atm, vapour pressure reduces to 0.60 atm. Mole fraction of solute is [UPSEAT 2003]
A.	0.25
B.	0.75
C.	0.5
D.	0.33
Answer» B. 0.75

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