Mass Transfer In liquid extraction, if the selectivity is unity, then Amount of solvent required will be minimum No separation will occur Separation of the constituents is the most effective Solvent flow rate should be very low Amount of solvent required will be minimum No separation will occur Separation of the constituents is the most effective Solvent flow rate should be very low ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer For a binary mixture with low relative volatility, continuous rectification to get pure products will require High reflux ratio Less number of trays Small cross-section column Low reflux ratio High reflux ratio Less number of trays Small cross-section column Low reflux ratio ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer In case of non-ideal gases and liquids, the molal diffusivity Varies inversely as the pressure Is independent of pressure Varies directly as the pressure Is equal to the volumetric diffusivity Varies inversely as the pressure Is independent of pressure Varies directly as the pressure Is equal to the volumetric diffusivity ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer In case of steam distillation, the steam leaving the liquid is not completely saturated with distillate vapour, because Total pressure is less Mixing of steam with the material being vaporised is not so intimate as to result in equilibrium condition Temperature is less Saturated steam is used for steam distillation Total pressure is less Mixing of steam with the material being vaporised is not so intimate as to result in equilibrium condition Temperature is less Saturated steam is used for steam distillation ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer In case of absorption & stripping, the interface of the liquid & gas phases are present in equilibrium, when the diffusional resistance of __________ is zero. Liquid phase Interface All of these Gas phase Liquid phase Interface All of these Gas phase ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer In case of physical adsorption, the difference between heat of adsorption and heat of normal condensation is Zero Called integral heat of adsorption Equal to the heat of wetting Equal to the heat of formation of surface compound Zero Called integral heat of adsorption Equal to the heat of wetting Equal to the heat of formation of surface compound ANSWER DOWNLOAD EXAMIANS APP
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