Ammonia in water
Benzol present in coke oven gas by wash oil
SO₂ in alkaline solution
All of the above
✅ The correct answer is option C.
Chemical Engineering MCQs
A packed tower compared to a plate tower for a particular mass transfer operation
Incurs smaller pressure drop
Allows installation of cooling coils
Is less costly when built in large sizes/diameters
Is more suitable, if suspended solids are present in fluid streams
✅ The correct answer is option A.
According to the film theory of mass transfer, the mass transfer co-efficient is proportional to (where, D = molecular diffusivity)
D
D2
D0.5
1/D
✅ The correct answer is option A.
Separation of the isotopes of helium for scientific investigations is done by
Reverse osmosis
Thermal diffusion
Leaching
Solvent extraction
✅ The correct answer is option B.
With increase in pressure, the relative volatility for a binary system
Increases
Decreases
Remains same
Either A or B, depends on the system
✅ The correct answer is option B.
Channelling is most severe
In towers packed with stacked packing
In towers packed randomly with crushed solids
In dumped packing of regular units
At very high liquid flow rate
✅ The correct answer is option A.
During dehumidification of unsaturated air wet bulb temperature & partial pressure of vapor are not constant. However, during evaporative cooling process with recirculated water supply, the __________ remains constant.
Wet bulb temperature
Partial pressure of water vapor
Relative humidity
None of these
✅ The correct answer is option A.
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
0.54
1.04
1.24
1.94
✅ The correct answer is option C.
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
At ground level
2 metres above the ground
5 metres above ground
10 metres above ground
✅ The correct answer is option A.
Extraction of pencillin employs a __________ extraction coloumn.
Centrifugal
Packed
Plate
None of these
✅ The correct answer is option A.