Mass Transfer The mass transfer co-efficient for a solid sphere of radius 'a' dissolving in a large volume of quiescent liquid, in which D is the diffusivity of solute, is D/a Dependent on the Reynolds number Proportional to √D D/2a D/a Dependent on the Reynolds number Proportional to √D D/2a ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer An aqueous solution of methanol is to be distilled in a tray column. High pressure steam is available as a source of heat. For a given reflux ratio and overhead composition, two options are being explored; (i) a reboiler is used and (ii) no reboiler is used but steam is fed directly to the bottom of the column. As compared to option (i), in option (ii) Composition of the residue remains unchanged More number of trays are required and the residue composition is more dilute in methanol Less number of trays are required More number of trays are required but the residue composition remains unchanged Composition of the residue remains unchanged More number of trays are required and the residue composition is more dilute in methanol Less number of trays are required More number of trays are required but the residue composition remains unchanged ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Solvent used in extractive distillation Does not alter the relative volatility of the original components Forms a low boiling azeotrope Is of low volatility Forms a high boiling azeotrope Does not alter the relative volatility of the original components Forms a low boiling azeotrope Is of low volatility Forms a high boiling azeotrope ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Dorr thickener is an equipment used for Sedimentation Leaching Classification Clarification Sedimentation Leaching Classification Clarification ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Agitator is provided in a crystalliser for All of these Formation of nuclei Crystal growth Avoiding deposition on cooler surfaces All of these Formation of nuclei Crystal growth Avoiding deposition on cooler surfaces ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer The dimension of diffusivity is same as that of the Kinematic viscosity Velocity head Molal concentration Density Kinematic viscosity Velocity head Molal concentration Density ANSWER DOWNLOAD EXAMIANS APP
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