Mass Transfer
Heat sensitive materials with very high latent heat of vaporisation may be economically separated using

Distillation
Liquid extraction
Absorption
Evaporation

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Mass Transfer
Flights in a rotary dryer are provided to

Reduce the residence time of solid
Lift and shower the solids thus exposing it thoroughly to the drying action of the gas
None of these
Increase the residence time of the solid

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Mass Transfer
In steam distillation, the

Product must be immiscible with water
Temperature is higher than the boiling point of either component
Temperature is 100°C
Temperature is more than 100° C

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