Mass Transfer When the solvent dissolves very little of solute, then Solvent of low latent heat of vaporisation should be used Large quantity of solvent is required to extract the solute Very small quantity of solvent is required Solvent of low freezing point should be used Solvent of low latent heat of vaporisation should be used Large quantity of solvent is required to extract the solute Very small quantity of solvent is required Solvent of low freezing point should be used 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 (De.t)1/2 (4De/t) (De/t)1/2 (4De/πt)1/2 (De.t)1/2 (4De/t) ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Which of the following remains constant during evaporative cooling process with recirculated water supply? Relative humidity None of these Wet bulb temperature Partial pressure of vapour Relative humidity None of these Wet bulb temperature Partial pressure of vapour ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Henry's law states that the Vapour pressure is equal to the product of the mole fraction and total pressure Partial pressure of a component over a solution is proportional to the mole fraction in the vapour Partial pressure of a component over a solution is proportional to its mole fraction in the liquid Partial pressure is equal to the product of the mole fraction and total pressure Vapour pressure is equal to the product of the mole fraction and total pressure Partial pressure of a component over a solution is proportional to the mole fraction in the vapour Partial pressure of a component over a solution is proportional to its mole fraction in the liquid Partial pressure is equal to the product of the mole fraction and total pressure 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 but the residue composition remains unchanged More number of trays are required and the residue composition is more dilute in methanol Less number of trays are required Composition of the residue remains unchanged More number of trays are required but the residue composition remains unchanged More number of trays are required and the residue composition is more dilute in methanol Less number of trays are required ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer A mixture of 10% C₆H₆ vapour in air at 25°C and 750 mm Hg has a dew point of 20°C. Its dew point at 30°C and 700 mm Hg will be around __________ °C. 21.7 18.7 27.3 20 21.7 18.7 27.3 20 ANSWER DOWNLOAD EXAMIANS APP
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