Mass Transfer
Inside the distillation column, the

Liquids are not always at their bubble points
Driving force for the vapour flow is the pressure drop
Pressure increases gradually from bottom to the top of the column
None of these

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

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