Mass Transfer
Steam distillation is used for separation of high boiling

Both of the options given here
none of the listed here
Substances from non-volatile impurities
Volatile impurity from still higher boiling substances

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Mass Transfer
Blowdown in a cooling tower

Is undesirable
All of these
Increases the scale forming tendencies of water
Means discarding a small fraction of circulating water to prevent and limit the concentration of salt and impurities

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