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Degree of freedom for leaching and solvent extraction process is_____________________?
Related MCQs
Unit operation involved in the prilling of urea is__________?
In physical terms, Schmidt number means __________?
At __________ reflux, theoretical number of plates in a distillation coloumn is calculated using Fenske-Underwood equation?
In case of an unsaturated mixture of gas and vapor, the percentage saturation is __________ its relative saturation?
Flash distillation is suitable for separating the constituents of a binary system, which __________?
In which of the following unit operations, the selectivity is an important parameter ?
A coalescer in a mixer-settler liquid-liquid extraction column__________?
During constant rate drying period, vaporisation rate per unit drying surface area __________?
In a distillation column, with increase in the reflux ratio, the heat removed in the cooler __________?
The feed to fractionating column is changed from saturated vapour to saturated liquid. If the separation and reflux ratio remains unchanged, the number of ideal stages will__________?
In most of the vacuum crystalliser, vacuum is generally produced by means of a__________?
__________ is concerned with the adsorption equilibria?
‘ADDUCTS’ and ‘CLATHRATES’ are used in case of__________?
The percentage humidity is less than the relative humidity only at __________ percent humidity?
At constant pressure, with increase of temperature, the dew point will __________?
NSc/NPr is called the__________?
The Schmidt number which is defined as, μ/ρ D, is the ratio of the__________?
An aqueous solution of methanol is to be distilled in a tray column. High pressure steam is available as a source of heat. For a given reflux ratio and overhead composition, two options are being explored; (i) a reboiler is used and (ii) no reboiler is used but steam is fed directly to the bottom of the column. As compared to option (i), in option (ii) __________?
In stripping section of continuous distillation column, the__________?
The suitable evaporator for concentration of foaming liquids is a __________ evaporator?
Mass transfer co-efficient varies as DAB 0.5, according to the __________ theory?
The solvent used in liquid extraction should not have high latent heat of vaporisation, because __________?
Absorption accompanied by heat evolution results in__________?
Component A is diffusing in a medium B. The flux NA relative to a stationary point is equal to the flux due to molecular diffusion, if__________?
With increase in temperature, the rate of extraction in leaching (solid-liquid extraction system) ?
In case of an ideal solution, the total vapor pressure varies __________ with the composition expressed as mole fraction?
Flooding in a distillation column is detected by a sharp __________?
Which of the following operations does not involve leaching ?
Diameter to height ratio for a raschig ring is__________?
With decrease in the throughput (compared with the design capacity) for a bubble cap distillation column, its efficiency__________?
For experimental determination of mass transfer co-efficient by wetted wall tower, the mass transfer area is__________?
Mass transfer co-efficient is directly proportional to DAB 0.5, according to __________ theory ?
Which of the following gas-liquid contacting devices incurs the least pressure drop for a particular duty ?
Compound A is extracted from a solution of A + B into a pure solvent S. A Co-current unit is used for the liquid-liquid extraction. The inlet rate of the solution containing A is 200 moles of B/hr.m2 and the solvent flow, rate is 400 moles of S/m2. hr. The equilibrium data is represented by Y = 3X2 , where Y is in moles of a A/moles of B and X is in moles A/moles of S. The maximum percentage extraction achieved in the unit is__________?
According to the film theory of mass transfer, the mass transfer co-efficient is proportional to (where, D = molecular diffusivity) ?
For a distillation column operating at minimum reflux, the__________?
__________ diffusion is used for separating the isotopes of methane ?
For a fixed number of ideal stages in a distillation column, as the reflux ratio is increased, the difference in composition between the top and bottom product streams__________?
The relative saturation of a partially saturated mixture of vapour and gas can be increased by __________ of the mixture?
Steam distillation is used for separation of high boiling __________?
When both the fluids flow concurrently in an absorber, the slope of the operating line is__________?
The McCabe ΔL law states that the__________?
Very tall packed towers are divided into series of beds to__________?
Separation of the isotopes of helium for scientific investigations is done by__________?
Flash distillation is suitable for the separation of components__________?
If „f’ is defined as above, then which of the following applies to a feed at dew point ?
According to Chilton-Colburn analogy for mass transfer, NSt.NSc 2/3 is equal to__________?
Wet bulb and dry bulb temperatures becomes identical at __________ percent saturation curve?
The partial pressure distribution of an ideal gas diffusing through another stagnant ideal gas at steady state follows a/an __________ law?
Out of two equilibrium curves, first one lies above the diagonal and the second lies below the diagonal in the x-y plot. It means that separation by distillation is__________?
A distillation column separates 10000 kg/hr of a benzene-toluene mixture as shown in the figure below: In the figure xF, xD and xW represent the weight fraction of benzene in the feed, distillate and residue respectively. The reflux ratio is__________ ?
Degree of freedom for leaching and solvent extraction process is_____________________?
A. 0
B. 1
C. 2
D. 3
Correct Answer:
3
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Last Updated:
February 17, 2019