Mass Transfer Molecular diffusivity of a liquid Increases with temperature Is independent of temperature May increase or decrease with temperature Decreases with temperature Increases with temperature Is independent of temperature May increase or decrease with temperature Decreases with temperature ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Chemisorption compared to physical absorption has Increased utilisation of stagnant zones of the liquid phase Lower adsorption rate None of these Lower capacity of the solvent for the solute gas Increased utilisation of stagnant zones of the liquid phase Lower adsorption rate None of these Lower capacity of the solvent for the solute gas ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Penetration theory states that the mass transfer co-coefficient is equal to (where, De is diffusivity and 't' is time) (De.t)1/2 (4De/πt)1/2 (4De/t) (De/t)1/2 (De.t)1/2 (4De/πt)1/2 (4De/t) (De/t)1/2 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are same for, NPr = NSc = __________ 3 4 2 1 3 4 2 1 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 0.7 0.25 0.9 0.5 0.7 0.25 0.9 0.5 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Heat load in a cooling tower Both A & B Is equal to the number of kg, of water circulated times the cooling range Neither A nor B Means the amount of heat thrown away (KCal/hr.) by the cooling tower Both A & B Is equal to the number of kg, of water circulated times the cooling range Neither A nor B Means the amount of heat thrown away (KCal/hr.) by the cooling tower ANSWER DOWNLOAD EXAMIANS APP
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