Mass Transfer At what percentage (by volume) of alcohol composition, it forms an azeotrope with water? 95 91.5 90 99 95 91.5 90 99 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Which of the following is an undesirable characteristic for the solvent used in gas absorption? Low vapor pressure High gas solubility None of these Low viscosity Low vapor pressure High gas solubility None of these Low viscosity 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 1 0.2 0.4 1 0.2 0.4 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Which of the following operations does not involve leaching? Dissolving gold from ores Dissolving pharmaceutical products from bark or roots Removing nicotine from its water solution by kerosene Dissolving sugar from the cells of the beet Dissolving gold from ores Dissolving pharmaceutical products from bark or roots Removing nicotine from its water solution by kerosene Dissolving sugar from the cells of the beet ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Plate towers are preferred to packed towers, when large temperature changes are involved, because of the reason that the Packing may be crushed due to thermal expansion/contraction of the components of the equipments 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 None of these Viscosity variation of the fluids may cause channeling/flooding Pressure drop in the equipment will be very high ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer The individual mass transfer co-efficients (moles/m² . s) for absorption of a solute from a gas mixture into a liquid solvent are, KL = 4.5 and KG = 1.5. The slope of the equilibrium line is 3. Which of the following resistance (s) is (are) controlling ? Liquid side Interfacial Gas side Both liquid and gas side Liquid side Interfacial Gas side Both liquid and gas side ANSWER DOWNLOAD EXAMIANS APP
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