Mass Transfer
Pick out the wrong statement pertaining to leaching.

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

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Mass Transfer
A distillation column with N plates is being operated under normal conditions. At some point of time, the operation is shifted to total reflux condition (i.e., no product and residue are being withdrawn and feed to the column is stopped). At the new steady state,

The top and bottom compositions correspond to the maximum enrichment available
Reboiler load and condenser load are minimum
Composition of vapors and that of liquid do not vary throughout the column
The top and bottom compositions are unchanged with and without total reflux

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