Mass Transfer According to the film theory of mass transfer, the mass transfer co-efficient is proportional to (where, D = molecular diffusivity) D0.5 D2 D 1/D D0.5 D2 D 1/D ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer If the solubilities of different components (in a liquid-liquid extraction system) increase with rise in temperature, then the temperature above which they dissolve completely is known as the critical solution temperature (CST or consolute temperature). If solubilities increase with decrease in temperature, then CST is the temperature below which they dissolve completely. If a binary system has no critical solution temperature, it implies that The system comprises of miscible liquids The system comprises of an azeotrope The system comprises of partially mis-cible liquids On heating, a vapor phase will appear ; while on cooling, a solid phase will appear The system comprises of miscible liquids The system comprises of an azeotrope The system comprises of partially mis-cible liquids On heating, a vapor phase will appear ; while on cooling, a solid phase will appear ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer The diffusivity (D) in a binary gas mixture is related to the temperature (T) as D ∝ T D ∝ T1.5 D ∝ T0.5 D ∝ T2 D ∝ T D ∝ T1.5 D ∝ T0.5 D ∝ T2 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer The interfacial area per unit volume of dispersion, in a gas-liquid contactor, for fractional hold up of gas = 0.1 and gas bubble diameter = 0.5 mm is given by (in m²/m³) 50 500 100 1000 50 500 100 1000 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer For gas absorption, low viscosity solvents are preferred, because of their Low pumping pressure drop Rapid absorption rates Better flow characteristics All of these Low pumping pressure drop Rapid absorption rates Better flow characteristics All of these ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer In an absorption coloumn, the flooding velocity for random packing is __________ that for stacked/regular packing. Smaller than Greater than Equal to Either A, or B ; depends on the type of packing Smaller than Greater than Equal to Either A, or B ; depends on the type of packing ANSWER DOWNLOAD EXAMIANS APP
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