Mass Transfer
In stripping section of continuous distillation column, the

Liquid is stripped of high boiler
None of these
Vapour is stripped of low boiler
Liquid is enriched with high boiler

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Mass Transfer
Flights in a rotary dryer are provided to

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

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