The reason for preferring packed towers over plate towers in distillation practice is that the packed tower operation gives Low pressure drop and low hold up High pressure drop and high hold up High pressure drop and low hold up Low pressure drop and high hold up TRUE ANSWER : ? YOUR ANSWER : ?
If Rm is the minimum reflux ratio, the optimum reflux ratio may be around __________ Rm. 5 3 to 4 2.5 to 3 1.2 to 1.5 TRUE ANSWER : ? YOUR ANSWER : ?
Solvent used in extractive distillation Is of low volatility Forms a low boiling azeotrope Forms a high boiling azeotrope Does not alter the relative volatility of the original components TRUE ANSWER : ? YOUR ANSWER : ?
In case of gases, the binary diffusivity is proportional to (where, P = pressure) 1/√P P √P 1/P TRUE ANSWER : ? YOUR ANSWER : ?
The relation among various mass transfer co-efficients (M.T.C) for ideal gases is given by (where, Kc & Km are M.T.C. for equimolar counter diffusion with concentration & mole fraction respectively as the driving force. and, Kp = M.T.C. for diffusion of a gas through a stagnant inert gas with pressure as driving force.) None of these Kc = Kp = Km Kc = Kp . RT = Km . RT/p Kc = Kp/RT = Km . RT/P TRUE ANSWER : ? YOUR ANSWER : ?
__________ columns are used for liquid dispersion in a continuous gas phase. Packed Pulse Sieve plate Bubble cap TRUE ANSWER : ? YOUR ANSWER : ?
Rose oil is extracted from rose leaves using __________ distillation. Extractive High pressure Steam Low pressure TRUE ANSWER : ? YOUR ANSWER : ?
The unit of volumetric diffusivity is Cm²/seC₂ Cm²/sec Cm/sec Cm³/sec TRUE ANSWER : ? YOUR ANSWER : ?
The diffusivity (D) in a binary gas mixture is related to the temperature (T) as D ∝ T0.5 D ∝ T D ∝ T2 D ∝ T1.5 TRUE ANSWER : ? YOUR ANSWER : ?
In distillation columns, the number of bubble caps per tray primarily depends upon the Allowable liquid velocity Allowable gas and liquid velocities Allowable gas velocity Feed composition TRUE ANSWER : ? YOUR ANSWER : ?