Mass Transfer Fenske-Underwood equation used for calculating the minimum number of theoretical plates in distillation column is valid for Constant molal overflow Total reflux Constant relative volatility All of these Constant molal overflow Total reflux Constant relative volatility All of these ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are same for, NPr = NSc = __________ 4 3 1 2 4 3 1 2 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Back-trapping in a distillation column Is desirable, as it provides improved vapour-liquid contact Reduces pressure drop Increases tray efficiency Decreases tray efficiency Is desirable, as it provides improved vapour-liquid contact Reduces pressure drop Increases tray efficiency Decreases tray efficiency ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer A pure drug is administered as a sphere and as a cube. The amount of drug is the same in the two tablets. Assuming that the shape and size do not influence the mass transfer, the ratio of rate of dissolution in water at t = 0 for the cubic to spherical tablet is 1.94 0.54 1.24 1.04 1.94 0.54 1.24 1.04 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Stage efficiency in a leaching process depends on the Both A & B Time of contact between the solid and the solution Vapour pressure of the solution Rate of diffusion of the solute through the solid and into the liquid Both A & B Time of contact between the solid and the solution Vapour pressure of the solution Rate of diffusion of the solute through the solid and into the liquid ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer As the reflux ratio, in a continuous counter-current extraction is increased, the number of stages Decrease Increase Remain unchanged Can either increase or decrease, depends on the system Decrease Increase Remain unchanged Can either increase or decrease, depends on the system ANSWER DOWNLOAD EXAMIANS APP
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