Mass Transfer
Dried finished product sampled from various parts of a __________ dryer exhibits non-uniformity in the moisture content.

Freeze
Rotary
Tray
None of these

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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

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

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Mass Transfer
Molecular diffusion is caused by the

Thermal energy of the molecules
Activation energy of the molecules
Transfer of molecules from low concentration to high concentration region
Potential energy of the molecules

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