Mass Transfer
Positive deviation from Raoult's law means a mixture whose total pressure is

Greater than that computed for ideality
Less than that computed for ideality
Less than the sum of the vapour pressure of the components
None of these

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Mass Transfer
The term "approach" in a cooling tower refers to the difference in the temperature of the

None of these
Hot water entering the tower and the wet bulb temperature of the surrounding air
Cold water leaving the tower and the wet bulb temperature of the surrounding air
Hot water entering and the cooled water leaving the cooling tower

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Mass Transfer
In case of steam distillation, the steam leaving the liquid is not completely saturated with distillate vapour, because

Total pressure is less
Mixing of steam with the material being vaporised is not so intimate as to result in equilibrium condition
Temperature is less
Saturated steam is used for steam distillation

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