Mass Transfer For gas absorption, low viscosity solvents are preferred, because of their Better flow characteristics Rapid absorption rates Low pumping pressure drop All of these Better flow characteristics Rapid absorption rates Low pumping pressure drop All of these ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Compound A is extracted from a solution of A + B into a pure solvent S. A Co-current unit is used for the liquid-liquid extraction. The inlet rate of the solution containing A is 200 moles of B/hr.m² and the solvent flow, rate is 400 moles of S/m². hr. The equilibrium data is represented by Y = 3X² , where Y is in moles of a A/moles of B and X is in moles A/moles of S. The maximum percentage extraction achieved in the unit is 0.9 0.5 0.7 0.25 0.9 0.5 0.7 0.25 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Flooding results in High tray efficiency Good contact between the fluids Low tray efficiency High gas velocity High tray efficiency Good contact between the fluids Low tray efficiency High gas velocity ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer In case of physical adsorption, the difference between heat of adsorption and heat of normal condensation is 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 Zero Called integral heat of adsorption Equal to the heat of wetting 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 None of these Pressure drop in the equipment will be very high Packing may be crushed due to thermal expansion/contraction of the components of the equipments Viscosity variation of the fluids may cause channeling/flooding None of these Pressure drop in the equipment will be very high Packing may be crushed due to thermal expansion/contraction of the components of the equipments Viscosity variation of the fluids may cause channeling/flooding ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Fenske's equation for determining the minimum number of theoretical stages in distillation column holds good, when the Mixture (to be separated) shows negative deviation from ideality Multicomponent distillation is involved Relative volatility is reasonably constant Mixture (to be separated) shows positive deviation from ideality Mixture (to be separated) shows negative deviation from ideality Multicomponent distillation is involved Relative volatility is reasonably constant Mixture (to be separated) shows positive deviation from ideality ANSWER DOWNLOAD EXAMIANS APP
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