Mass Transfer
For a fixed number of ideal stages in a distillation column, as the reflux ratio is increased, the difference in composition between the top and bottom product streams

Remains unaffected
Decreases
Passes through a maximum
Increases

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Mass Transfer
Henry's law states that the

Vapour pressure is equal to the product of the mole fraction and total pressure
Partial pressure of a component over a solution is proportional to its mole fraction in the liquid
Partial pressure of a component over a solution is proportional to the mole fraction in the vapour
Partial pressure is equal to the product of the mole fraction and total pressure

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