Packed
Bubble
Spray
Tray
✅ The correct answer is option B.
Mass Transfer MCQs
When adsorption hysteresis is observed, the desorption equilibrium pressure is __________ that obtained by adsorption.
Always lower than
Always higher than
Same as
Dependent on the system; can be either lower or higher than
✅ The correct answer is option A.
Unit operation involved in the prilling of urea is
Evaporation
Drying
Crystallisation
Both B and C
✅ The correct answer is option D.
__________ is concerned with the adsorption equilibria.
Fick’s law
Gibb’s equation
Freundlich equation
None of these
✅ The correct answer is option C.
The percentage humidity is less than the relative humidity only at __________ percent humidity.
Zero
Hundred
Both zero and hundred
None of these
✅ The correct answer is option C.
For stripping of a gas in a counter current stripper, the operating line
Lies above the equilibrium curve
Lies below the equilibrium curve
Can lie above or below the equilibrium curve
Is always parallel to the equilibrium curve
✅ The correct answer is option C.
Separation of a mixture of two gases by absorption in the liquid solvent depends upon the difference in their
Viscosity
Density
Solubility
Relative volatility
✅ The correct answer is option C.
Humidification involves mass transfer between a pure liquid phase and a fixed gas, which is
Insoluble in the liquid
Soluble in the liquid
Non-ideal in nature
At a fixed temperature
✅ The correct answer is option A.
Leaching of uranium ore and gold ore is done in
Centrifugal extractor
Pachuka tanks
Bollman extractor
None of these
✅ The correct answer is option B.