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The operating cost of a distillation column at minimum reflux ratio is____________________?
Related MCQs
A pure drug is administered as a sphere and as a cube. The amount of drug is the same in the two tablets. Assuming that the shape and size do not influence the mass transfer, the ratio of rate of dissolution in water at t = 0 for the cubic to spherical tablet is__________?
With increase in temperature, the mutual solubility of two liquids__________?
The diffusivity D. in a binary gas mixture is related to the pressure (P) as__________?
Dorr thickener is an equipment used for__________?
Can the efficiency of a plate in the distillation tower be greater than 100% ?
Absorption (liquid-gas system) with evolution of heat as compared to isothermal absorption results in__________?
Reverse osmosis is also called__________?
Laboratory determination of the diffusivity of vapor is done by __________ method?
Paper industry employs __________ driers?
Use of packed towers for distillation is generally limited to the__________?
__________ extractor is used for the concentration of radioactive nuclear waste?
Removal of __________ exemplifies an adsorption unit operation?
The apex of an equilateral-triangular coordinate (in ternary liquid system) represents a/an __________?
Steady state temperature reached by a small amount of liquid evaporating into a large amount of unsaturated vapour-gas mixture is called the __________ temperature?
In a binary distillation column, if the feed contains 40 mole % vapour, the q line will have a slope of__________?
In case of unsaturated air__________?
The individual mass transfer co-efficients (moles/m2s) for absorption of a solute from a gas mixture into a liquid solvent are, KL = 4.5 and KG = 1.5. The slope of the equilibrium line is 3. Which of the following resistance (s) is (are) controlling ?
Minimum reflux ratio in a distillation column results in__________?
Steady state equimolal counter diffusion is encountered in__________?
Experimental determination of __________ is done by wetted wall column method?
Measurement of the interfacial area of mass transfer is achieved easily & accurately in case of a __________ column?
In the layout plan for a vacuum distillation unit, operating at 60 mm Hg, supported by a barometric condenser, the appropriate place for the location of vacuum drum for collecting the distillate will be__________?
High pressure at the bottom of a distillation tower handling heat sensitive materials results in __________?
Which of the following is an undesirable property in a tower packing ?
Which of the following is directly concerned with Psychrometry ?
At the boiling point of the liquid at the prevailing pressure, the saturated absolute humidity becomes__________?
Ammonia present in the coke oven gas is removed by washing with__________?
For ethanol-water system, the lowering of distillate quality from 95% to 92% will cause __________ plate requirement?
Lewis number (Le) is__________?
Most important factor to be considered in the selection of packings for absorbers is the __________ of packing?
To get high tray efficiency__________?
In a gas-liquid absorption column, for obtaining the maximum absorption efficiency__________?
The slope of the operating line for a single component co-current absorber when plotted in terms of mole ratio units is__________?
For a ternary mixture, in which equilateral triangular co-ordinate is used in leaching and extraction, a __________ of the equilateral triangular co-ordinates?
Leaching of uranium ore and gold ore is done in__________?
In case of physical adsorption, the difference between heat of adsorption and heat of normal condensation is__________?
Humidity chart is useful for the solution of problems concerning condensation, vaporisation and air conditioning. At a given dry bulb temperature, value of humidity obtained from the humidity chart directly, is in terms of __________ humidity?
Powdery materials can be guarded against caking tendency on storage by__________?
The minimum liquid rate to be used in an absorber corresponds to an operating line__________?
Separation of two volatile liquids by distillation makes use of their__________?
The critical moisture content in case of drying indicates the __________ rate period?
The drying time between fixed moisture content within diffusion controlled ‘falling rate period’ is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid) ?
The dew point of an unsaturated gas-vapor mixture does not depend upon the __________ of the mixture?
The slope of 9-line is determined by the__________?
Freundlich equation applies to the adsorption of solute from__________?
A solid is being dried in the linear drying rate regime from moisture content Xo to XF. The drying rate is zero at X = 0 and the critical moisture content is the same as the initial moisture Xo. The drying time for M = (Ls/ARc) is (where, L = total mass of dry solid, A = total surface area for drying Rc = Constant maximum drying rate per unit area X = moisture content (in mass of water/mass of dry solids))__________?
The Hatta number is important in__________?
For a binary mixture with low relative volatility__________?
The interfacial area per unit volume of dispersion, in a gas-liquid contactor, for fractional hold up of gas = 0.1 and gas bubble diameter = 0.5 mm is given by (in m2/m3) ?
Rayleigh’s equation applies to __________ distillation?
In extraction, as the temperature increases, the area of heterogeneity (area covered by binodal curve)__________?
The operating cost of a distillation column at minimum reflux ratio is____________________?
A. Minimum
B. Maximum
C. Infinite
D. Zero
Correct Answer:
Minimum
✔
Last Updated:
February 16, 2019