Mass Transfer
In rectifying section of a continuous distillation column, the

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

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Mass Transfer
Bollman extractor

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

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