Mass Transfer Binary distillation involves the mass transfer by __________ at the gas-liquid interface. Either A or B Unidirectional diffusion from gas to liquid phase 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 Unidirectional diffusion from liquid to gas phase A counter diffusion at an almost equal molar rate ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer In McCabe-Thiele method of theoretical plate calculation for a distillation column, the operating lines of stripping and rectifying sections coincide with the diagonal at __________ reflux. Maximum permissible Operating Minimum Total Maximum permissible Operating Minimum Total ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer When the temperature and humidity of air is low, we usually use __________ draft cooling tower. Induced Forced None of these Natural Induced Forced None of these Natural ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Steam distillation is not recommended to be used, if the Material can not be distilled by indirect heating even under low pressure, because of the high boiling temperature Liquids decompose, if distilled directly at atmospheric pressure Material to be distilled is thermally unstable or has the tendency to react with other components associated with it, at the boiling temperature Azeotropic mixture is to be separated and the final product is miscible with water Material can not be distilled by indirect heating even under low pressure, because of the high boiling temperature Liquids decompose, if distilled directly at atmospheric pressure Material to be distilled is thermally unstable or has the tendency to react with other components associated with it, at the boiling temperature Azeotropic mixture is to be separated and the final product is miscible with water ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer At equilibrium the concentration of water in vapour phase (C*)in kg/m³ of air space and the amount of water (m) adsorbed per kg of dry silica gel are related by, C* = 0.0667m. To maintain dry conditions in a room of air space 100m³ containing 2.2 kg of water vapour initially, 10 kg of dry silica gel is kept in the room. The fraction of initial water remaining in the air space after a long time (during which the temperature is maintained constant) is 0.4 1 0.2 0.4 1 0.2 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Lewis number, which is important in problems involving simultaneous heat and mass transfer, is the ratio of Thermal diffusivity to mass diffusivity None of these Mass diffusivity to momentum diffusivity Momentum diffusivity to thermal diffusivity Thermal diffusivity to mass diffusivity None of these Mass diffusivity to momentum diffusivity Momentum diffusivity to thermal diffusivity ANSWER DOWNLOAD EXAMIANS APP
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