Mass Transfer If Rm is the minimum reflux ratio, the optimum reflux ratio may be around __________ Rm. 5 1.2 to 1.5 3 to 4 2.5 to 3 5 1.2 to 1.5 3 to 4 2.5 to 3 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer In case of non-ideal gases and liquids, the molal diffusivity Varies directly as the pressure Is independent of pressure Varies inversely as the pressure Is equal to the volumetric diffusivity Varies directly as the pressure Is independent of pressure Varies inversely as the pressure Is equal to the volumetric diffusivity ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Flash distillation is Most useful for handling binary systems Same as simple distillation Same as differential distillation Used for multicomponent systems like crude refining Most useful for handling binary systems Same as simple distillation Same as differential distillation Used for multicomponent systems like crude refining ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Which of the following is an undesirable characteristic for the solvent used in gas absorption? Low vapor pressure Low viscosity High gas solubility None of these Low vapor pressure Low viscosity High gas solubility None of these ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Chemisorption compared to physical absorption has Lower adsorption rate None of these Increased utilisation of stagnant zones of the liquid phase Lower capacity of the solvent for the solute gas Lower adsorption rate None of these Increased utilisation of stagnant zones of the liquid phase Lower capacity of the solvent for the solute gas ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer A distillation column with N plates is being operated under normal conditions. At some point of time, the operation is shifted to total reflux condition (i.e., no product and residue are being withdrawn and feed to the column is stopped). At the new steady state, Reboiler load and condenser load are minimum The top and bottom compositions correspond to the maximum enrichment available The top and bottom compositions are unchanged with and without total reflux Composition of vapors and that of liquid do not vary throughout the column Reboiler load and condenser load are minimum The top and bottom compositions correspond to the maximum enrichment available The top and bottom compositions are unchanged with and without total reflux Composition of vapors and that of liquid do not vary throughout the column ANSWER DOWNLOAD EXAMIANS APP
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