Mass Transfer
Pick out the wrong statement pertaining to leaching.

Vegetable seeds can be leached in either of Bollman extractor, Rotocel or Kennedy extractor
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

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Mass Transfer
Channelling is most severe

In towers packed with stacked packing
At very high liquid flow rate
In towers packed randomly with crushed solids
In dumped packing of regular units

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