Pick out the wrong statement ?
Pick out the wrong statement ?
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__________?
Mass transfer co-efficient is directly proportional to DAB according to the __________ theory?
Dorr thickener is an equipment used for__________?
Can the efficiency of a plate in the distillation tower be greater than 100% ?
With the lowering of equilibrium pressure, at a given temperature, the amount of adsorbate on the adsorbent ?
H2S present in naphtha reformed gas is removed by absorbing with__________?
In liquid extraction, if the selectivity is unity, then__________?
Drying of a wet solid under constant drying conditions means the exposure of the wet solid to the air of constant__________?
Design calculation for multiple component distillation is done by__________?
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?
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__________?
High pressure at the bottom of a distillation tower handling heat sensitive materials results in__________?
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__________?
Which of the following is directly concerned with Psychrometry ?
Measurement of the interfacial area of mass transfer is achieved easily & accurately in case of a __________ column?
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__________?
Most important factor to be considered in the selection of packings for absorbers is the __________ of packing?
Which of the following provides maximum contact surface for a liquid-vapour system ?
Experimental determination of __________ is done by wetted wall column method?
Which is not concerned directly with mass transfer ?
To get high tray efficiency__________?
For ethanol-water system, the lowering of distillate quality from 95% to 92% will cause __________ plate requirement?
Lewis number (Le) is__________?
In a gas-liquid absorption column, for obtaining the maximum absorption efficiency__________?
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__________?
Leaching of uranium ore and gold ore is done in__________?
For a ternary mixture, in which equilateral triangular co-ordinate is used in leaching and extraction, a __________ of the equilateral triangular co-ordinates?
The slope of the operating line for a single component co-current absorber when plotted in terms of mole ratio units is__________?
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?
In case of physical adsorption, the difference between heat of adsorption and heat of normal condensation is__________?
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 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 Hatta number is important in__________?
Freundlich equation applies to the adsorption of solute from__________?
The slope of 9-line is determined by the__________?
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)__________?
Plate efficiency in a distillation column is reduced due to the __________ of liquid?

Pick out the wrong statement?

A. Mass transfer co-efficient does not account for gas-liquid diffusion
B. Diffusion co-efficient and mass transfer co-efficient are not same in any mass transfer
operation
C. Contacting cold vapor-gas mixture with hot liquid exemplifies humidification process
D. Contacting cold liquid with warm vapor-gas mixture exemplifies dehumidification process

Correct Answer: Mass transfer co-efficient does not account for gas-liquid diffusion ✔

Last Updated: February 15, 2019