Mass Transfer
Pick out the wrong statement pertaining to leaching.

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

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Mass Transfer
A 25 cm x 25 cm x 1 cm flat sheet weighing 1.2 kg initially was dried from both sides under constant drying rate conditions. It took 1500 seconds for the weight of the sheet to reduce to 1.05 kg. Another 1m x 1m x 1cm flat sheet of the same material is to be dried from one side only.Under the same constant drying rate conditions, the time required for drying (in seconds) from its initial weight of 19.2 kg to 17.6 kg is

1000
2500
1500
2000

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Mass Transfer
Which of the following processes is not an example of adsorption applied to gaseous separations?

Removal of objectionable odour and impurities from industrial gases
Dehumidification of air and gas
Decolouration of yellow glycerene
Recovery of valuable solvent vapors from dilute mixture with air and other gases

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