Mass Transfer
Binary distillation involves the mass transfer by __________ at the gas-liquid interface.

Unidirectional diffusion from liquid to gas phase
A counter diffusion at an almost equal molar rate
Either A or B
Unidirectional diffusion from gas to liquid phase

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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

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

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