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

Hot water entering the tower and the cooled water leaving the tower
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
None of the listed here

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Mass Transfer
In a counter-current liquid extractor

Only one of the liquids may be pumped at any desired rate
Both liquids can have any desired flow rate
Both liquids flow at fixed rate
Liquid's flow rate depends upon the temperature and pressure

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Mass Transfer
Pick out the wrong statement. Raoult's law does not apply, when the

Size of component molecules are not equal
Component molecules are nonpolar
Attractive forces between like and unlike molecules in the solution are approximately equal
Chemical combination or molecular association between unlike molecules takes place in the formation of solution

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