Mass Transfer Inside the distillation column, the Liquids are not always at their bubble points None of these Pressure increases gradually from bottom to the top of the column Driving force for the vapour flow is the pressure drop Liquids are not always at their bubble points None of these Pressure increases gradually from bottom to the top of the column Driving force for the vapour flow is the pressure drop 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 ? Both liquid and gas side Liquid side Gas side Interfacial Both liquid and gas side Liquid side Gas side Interfacial ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer The surface renewal frequency in Danckwerts model of mass transfer is given by (KL: mass transfer co-efficient) √(KL².DA) KL².DA KL/DA² KL²/DA √(KL².DA) KL².DA KL/DA² KL²/DA ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Dew point of an air-water vapor mixture At constant humidity & total pressure is fixed All of the listed here Decreases with decrease in pressure Corresponding to any point on the humidity chart is obtained by projecting a line through this point parallel to the temperature axis and to the saturation curve At constant humidity & total pressure is fixed All of the listed here Decreases with decrease in pressure Corresponding to any point on the humidity chart is obtained by projecting a line through this point parallel to the temperature axis and to the saturation curve ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Tower diameter may be decreased by Use of increased tray spacing Using higher reflux ratio Increasing the vapour flow rate Increasing the liquid flow rate Use of increased tray spacing Using higher reflux ratio Increasing the vapour flow rate Increasing the liquid flow rate ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer During drying of a solid, the critical moisture content increases with Increased thickness of the solid Both B and C Decreased drying rate Increased drying rate Increased thickness of the solid Both B and C Decreased drying rate Increased drying rate ANSWER DOWNLOAD EXAMIANS APP
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