Mass Transfer The surface renewal frequency in Danckwerts model of mass transfer is given by (KL: mass transfer co-efficient) KL/DA² KL².DA KL²/DA √(KL².DA) KL/DA² KL².DA KL²/DA √(KL².DA) ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer The vapour pressure exerted by the moisture contained in a wet solid depends upon the Nature of the solid Nature of the moisture All of these Temperature Nature of the solid Nature of the moisture All of these Temperature ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer The dew point of an unsaturated gas-vapor mixture does not depend upon the __________ of the mixture. Temperature Composition All of these Total pressure Temperature Composition All of these Total pressure ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer When adsorption hysteresis is observed, the desorption equilibrium pressure is __________ that obtained by adsorption. Same as Always higher than Always lower than Dependent on the system; can be either lower or higher than Same as Always higher than Always lower than Dependent on the system; can be either lower or higher than ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer If f = moles of vapour present per mole of feed, then the slope of feed line is - 1/f (1 - f)/f - (f - 1)/f - f/(1 - f) - 1/f (1 - f)/f - (f - 1)/f - f/(1 - f) ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Steam distillation is not recommended to be used, if the Azeotropic mixture is to be separated and the final product is miscible with water Liquids decompose, if distilled directly at atmospheric pressure Material can not be distilled by indirect heating even under low pressure, because of the high boiling temperature 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 Liquids decompose, if distilled directly at atmospheric pressure Material can not be distilled by indirect heating even under low pressure, because of the high boiling temperature Material to be distilled is thermally unstable or has the tendency to react with other components associated with it, at the boiling temperature ANSWER DOWNLOAD EXAMIANS APP
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