Mass Transfer
Tower diameter may be decreased by

Increasing the vapour flow rate
Increasing the liquid flow rate
Using higher reflux ratio
Use of increased tray spacing

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Mass Transfer
Pick out the wrong statement pertaining to leaching.

Fine solids can not be leached in a Pachuka tank
Door classifier can be used for leaching of coarse solids
Very high temperature is not needed for the leaching of sugar beet
Vegetable seeds can be leached in either of Bollman extractor, Rotocel or Kennedy extractor

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