A. 1
B. 0.24
C. 3.97
D. 600
Correct Answer: 1 ✔
Last Updated: February 17, 2019
Related MCQs
- Unsaturated air (with dry bulb temperature and dew point being 35°C and 18°C respectively) is passed through a water spray chamber maintained at 15°C. The air will be cooled__________?
- The equilibrium liquid composition compared to the vapor composition in case of__________?
- Dry bulb temperature of the gas is __________ the wet bulb temperature?
- Which of the following is not a unit of mass transfer co-efficient ?
- The value of NA/(NA + NB), for steady state equimolal counter diffusion of two gases ‘A’ and ‘B’ is__________?
- Rose oil is extracted from rose leaves using __________ distillation?
- Back-trapping in a distillation column ?
- In the constant rate period of the rate of drying curve for batch drying,__________?
- The most economical range of absorption factor is__________?
- In case of absorption, both the operating and equilibrium lines will be straight for__________?
- Bollman extractor__________?
- When the solvent dissolves very little of solute, then__________?
- Tea percolation employs__________?
- The equipment used in the extraction of highly corrosive radioactive liquids is__________?
- With increase in temperature, the solubility of gases in liquids, at fixed pressure__________?
- Degree of freedom for leaching and solvent extraction process is__________?
- 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) ?