Free
Unbound
Equilibrium
Bound
✅ The correct answer is option C.
Mass Transfer MCQs
__________ is the temperature at which a gas-vapor mixture becomes saturated, when cooled at constant total pressure out of contact with a liquid.
Dew point
Bubble point
Dry bulb temperature
Wet bulb temperature
✅ The correct answer is option A.
The change in enthalpy per unit weight of adsorbed gas when adsorbed on gas free or “outgassed” adsorbent to from a definite concentration of adsorbate is called its
Integral heat of adsorption
Heat of wetting
Differential heat of adsorption
Heat of normal condensation
✅ The correct answer is option A.
Overall efficiency of the distillation column is
The ratio of number of ideal plates to actual plates
The ratio of number of actual plates to ideal plates
Same as the Murphree efficiency
Always more than the point efficiency
✅ The correct answer is option A.
Dimension of mass diffusivity is the same as that of
Kinematic viscosity
Dynamic viscosity
Surface tension
Pressure
✅ The correct answer is option A.
Which is not concerned directly with mass transfer?
Schmidt number
Sherwood number
Lewis relationship
Froude number
✅ The correct answer is option D.
A coalescer in a mixer-settler liquid-liquid extraction coloumn
Comprises of thin bed of substances of extended surface having high porosity
Helps in increasing the bubble size entering the settler
Helps in increasing the settling rate of the bubbles
All of the above
✅ The correct answer is option D.
In a gas-liquid absorption coloumn, for obtaining the maximum absorption efficiency
Liquid stream should be distributed uniformly
Gas stream should be distributed uniformly
Both gas as well as liquid streams should be distributed uniformly
By passing should be completely avoided
✅ The correct answer is option C.
In an absorption coloumn, the flooding velocity for random packing is __________ that for stacked/regular packing.
Greater than
Smaller than
Equal to
Either A, or B ; depends on the type of packing
✅ The correct answer is option B.
Calculation of mass transfer co-efficient is mostly/normally done using __________ theory.
Surface renewal
Film
Penetration
None of these
✅ The correct answer is option B.