A. Adsorption
B. Binary distillation
C. Gas absorption
D. Humidification
Related Mcqs:
- Lewis number (Le) is____________________?
A. Sc × Pr
B. Pr × St
C. Sh × Pr
D. St × Sh - Lewis number (Le) is___________________?
A. Sc × Pr
B. Pr × St
C. Sh × Pr
D. St × Sh - The value of Lewis number (Le = Sc/Pr) for air-water vapour system is around_________________?
A. 1
B. 0.24
C. 3.97
D. 600 - Schmidt number and Lewis number for pure air at atmospheric conditions are respectively__________________?
A. < 1 and ≈ 1
B. 1 and 0
C. > 1 and ≈ 1
D. 0 and ≈ 1 - Lewis number, which is important in problems involving simultaneous heat and mass transfer, is the ratio of__________________?
A. Mass diffusivity to momentum diffusivity
B. Thermal diffusivity to mass diffusivity
C. Momentum diffusivity to thermal diffusivity
D. None of these - If mass diffusivity in a mixture is equal to the thermal diffusivity, then the Lewis number is____________________
A. 0
B. 1
C. 1 - In which of the following unit operations, the selectivity is an important parameter ?
A. Distillation
B. Solvent extraction
C. Absorption
D. None of these - Which of the following unit operations makes use of Thiele-Geddes equation ?
A. Liquid-liquid extraction
B. Solid-liquid extraction
C. Multi-component absorption with chemical reaction
D. Multi-component distillation - Which of the following operations does not involve leaching ?
A. Dissolving gold from ores
B. Dissolving pharmaceutical products from bark or roots
C. Dissolving sugar from the cells of the beet
D. Removing nicotine from its water solution by kerosene - 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_________________________?
A. 25%
B. 50%
C. 70%
D. 90%
