CO2 can be absorbed by____________________?

Related Mcqs:

1. H2S is being absorbed in a gas absorber unit. The height of the transfer unit based on the overall mass transfer coefficient on the gas side is 0.4 m. The equilibrium data is given by, y = 1.5 x. The bulk concentration of H2S has to be reduced from 0.05 to 0.001 mole fraction in the gas side. The height of the tower (in meters) corresponding to an operating line given by, y = 5x + 0.001 is ______________________?

   A. 2.0
   B. 1.56
   C. 1.0
   D. 0.56

2. The change in enthalpy, when a unit quantity of gas is absorbed by relatively large quantity of adsorbent (on which a definite concentration of the adsorbed gas already exists) is termed as the_________________?

   A. Differential heat of adsorption
   B. Heat of wetting
   C. Integral heat of adsorption
   D. None of these

3. The process employing desorption of the absorbed solute by a solvent is called____________________?

   A. Elution
   B. Osmosis
   C. Reverse osmosis
   D. Sublimation

4. Acetic acid will be most economically separated from a dilute solution of acetic acid in water by____________________?

   A. Solvent extraction
   B. Continuous distillation
   C. Evaporation
   D. Absorption

5. For the flow of gases through a capillary, with increase in temperature, the permeability __________________ as per Knudsen law?

   A. Increases
   B. Decreases
   C. Remain same
   D. Either A. or B.; depends on the gas

6. The velocity, concentration and temperature boundary, for the boundary layer development on a flat plate during connective mass transfer will be same, if___________________?

   A. NSc = 1
   B. NSc = NPr = NLe
   C. NPr = NLe
   D. NSc = NLe

7. Rayleigh equation applies to _________________ distillation ?

   A. Differential
   B. Flash
   C. Equilibrium
   D. Molecular

8. The interfacial area per unit volume of dispersion, in a gas-liquid contactor, for fractional hold up of gas = 0.1 and gas bubble diameter = 0.5 mm is given by (in m2/m3)_________________?

   A. 500
   B. 1200
   C. 900
   D. 800

9. Laboratory determination of the diffusivity of vapor is done by ______________ method?

   A. Wetted wall column
   B. Gilliland’s
   C. Winkelmann’s
   D. Wike’s

10. Leaching of uranium ore and gold ore is done in________________________?

    A. Centrifugal extractor
    B. Pachuca tanks
    C. Bollman extractor
    D. None of these