A. Operating line lies above the equilibrium line
B. Operating line lies below the equilibrium line
C. Both operating and equilibrium lines are parallel
D. Pressure drop in the column is very high
Related Mcqs:
- Absorption factor, for a fixed degree of absorption from a fixed amount of gas should be_________________?
A. 1
B. > 1
C. < 1
D. ≤ 1 - In a packed absorption tower, if the equilibrium and operating lines are both straight lines, then the ratio, HETP/HTUOG ______________ the absorption factor?
A. Increases with increase in
B. Is one at unity value of
C. Both A. and B.
D. Neither A. nor B. - In gas-liquid contact operation, the number of ideal stages, N = (xa – xb)/(xb – x*b). This is true when the stripping factor ‘S’ is ________________?
A. S > 1
B. S < 1
C. S = 1
D. S = ∞ - In a gas-liquid absorption column, for obtaining the maximum absorption efficiency___________________?
A. Liquid stream should be distributed uniformly
B. Gas stream should be distributed uniformly
C. Both gas as well as liquid streams should be distributed uniformly
D. By passing should be completely avoided - In a gas-liquid absorption column, for obtaining the maximum absorption efficiency____________________?
A. Liquid stream should be distributed uniformly
B. Gas stream should be distributed uniformly
C. Both gas as well as liquid streams should be distributed uniformly
D. By passing should be completely avoided
Answer: Option C - Absorption (liquid-gas system) with evolution of heat as compared to isothermal absorption results in_________________?
A. Decreased solute solubility
B. Large minimum liquid to gas (L/G) ratio
C. Large number of trays
D. All A., B. and C. - Absorption accompanied with chemical reaction is exemplified by the absorption of___________________?
A. Ammonia in water
B. Benzol present in coke oven gas by wash oil
C. SO2 in alkaline solution
D. All A., B. and C. - In the absorption of ammonia in water, the main resistance to absorption is by the _________________ phase?
A. Liquid
B. Gas
C. Both A. & B.
D. Neither A. nor B. - For a fixed number of ideal stages in a distillation column, as the reflux ratio is increased, the difference in composition between the top and bottom product streams__________________?
A. Increases
B. Decreases
C. Remain unaffected
D. Passes through a maximum - 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______________________?
A. Increase
B. Decrease
C. Remain same
D. Depend on saturated boiling point; may increase or decrease
