Mass Transfer Steam distillation is not recommended to be used, if the Material can not be distilled by indirect heating even under low pressure, because of the high boiling temperature Liquids decompose, if distilled directly at atmospheric pressure Material to be distilled is thermally unstable or has the tendency to react with other components associated with it, at the boiling temperature Azeotropic mixture is to be separated and the final product is miscible with water Material can not be distilled by indirect heating even under low pressure, because of the high boiling temperature Liquids decompose, if distilled directly at atmospheric pressure Material to be distilled is thermally unstable or has the tendency to react with other components associated with it, at the boiling temperature Azeotropic mixture is to be separated and the final product is miscible with water ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Penetration theory relates the average mass transfer co-efficient (K) with diffusivity (D) as K ∝ D2 K ∝ D K ∝ D1.5 K ∝ √D K ∝ D2 K ∝ D K ∝ D1.5 K ∝ √D ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer In case of non-ideal gases and liquids, the molal diffusivity Varies directly as the pressure Varies inversely as the pressure Is equal to the volumetric diffusivity Is independent of pressure Varies directly as the pressure Varies inversely as the pressure Is equal to the volumetric diffusivity Is independent of pressure ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Back-trapping in a distillation column Is desirable, as it provides improved vapour-liquid contact Reduces pressure drop Decreases tray efficiency Increases tray efficiency Is desirable, as it provides improved vapour-liquid contact Reduces pressure drop Decreases tray efficiency Increases tray efficiency ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer When the solvent dissolves very little of solute, then Very small quantity of solvent is required Solvent of low latent heat of vaporisation should be used Solvent of low freezing point should be used Large quantity of solvent is required to extract the solute Very small quantity of solvent is required Solvent of low latent heat of vaporisation should be used Solvent of low freezing point should be used Large quantity of solvent is required to extract the solute ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Nitrobenzene (boiling point = 210.6°C) is steam distilled at 1 atm pressure.Nitrobenzene will distill off __________ °C. At > 210.6 Between 100 and 210 At < 100 None of the listed here At > 210.6 Between 100 and 210 At < 100 None of the listed here ANSWER DOWNLOAD EXAMIANS APP
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