Mass Transfer
Pick out the wrong statement pertaining to leaching.

Fine solids can not be leached in a Pachuka tank
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
Door classifier can be used for leaching of coarse solids

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Mass Transfer
Plate towers are preferred to packed towers, when large temperature changes are involved, because of the reason that the

Pressure drop in the equipment will be very high
Viscosity variation of the fluids may cause channeling/flooding
None of these
Packing may be crushed due to thermal expansion/contraction of the components of the equipments

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Mass Transfer
For the air water system under ambient conditions, the adiabatic saturation temperature and the wet bulb temperature are nearly equal, because

Water has a high latent heat of evaporation
They are always equal under all circumstances
Lewis number is close to unity
Solubility of the components of air in water is very small

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