Mass Transfer
A liquid mixture contains 30% o-xylene, 60% p-xylene and 10%. m-xylene (all percentages in w/w). Which of the following statements would be true in respect of this mixture?

The mixture contain optical isomers
The composition of the mixture in mole percent is: o-xylene 30, p-xylene 60 and m-xyoene 10
The mixture exhibits an azeotrope at 101.3 kPa
The composition of the mixture, in percent by volume is: o-xylene 30, p-xylene 60. and m-xylene 10

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Mass Transfer
Bollman extractor

Is a static bed leaching equipment
Is a centrifugal extractor
Employs only counter-current extraction
Is used for extraction of oil from oilseed

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Mass Transfer
In an operating distillation column, the

Driving force for the liquid flow is its specific weight
Vapors and liquids are at their dew point and bubble point respectively
Highest temperature is encountered at the top of the column
Driving force for the vapor flow is the pressure drop, as the pressure decreases gradually from the bottom to the top of the column

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