Mass Transfer
Agitator is provided in a crystalliser for

Avoiding deposition on cooler surfaces
All of these
Crystal growth
Formation of nuclei

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Mass Transfer
Plate efficiency

Increases due to foaming
Increases due to liquid entrainment
Increases due to weeping and dumping of liquid
Is a function of the mass transfer between liquid and vapour

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Mass Transfer
Bollman extractor

Is a static bed leaching equipment
Employs only counter-current extraction
Is used for extraction of oil from oilseed
Is a centrifugal extractor

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