Absorption accompanied by heat evolution results in____________________?

Related Mcqs:

1. 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.

2. 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.

3. 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

4. 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

5. Absorption factor, for a fixed degree of absorption from a fixed amount of gas should be_________________?

   A. 1
   B. > 1
   C. < 1
   D. ≤ 1

6. 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.

7. 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.

8. High pressure at the bottom of a distillation tower handling heat sensitive materials results in____________________?

   A. Thermal decomposition of bottoms
   B. Increased relative volatility
   C. Erosion of the tower
   D. Very efficient operation

9. Radioactive nuclear waste is treated in____________________?

   A. Mixer-settler extractor
   B. Rotating-disc contactor
   C. Pulsed column extractor
   D. Bollman extractor

10. In case of physical adsorption, the difference between heat of adsorption and heat of normal condensation is_________________?

    A. Equal to the heat of formation of surface compound
    B. Equal to the heat of wetting
    C. Zero
    D. Called integral heat of adsorption