Separation of a mixture of two gases by absorption in the liquid solvent depends upon the difference in their____________________?

Related Mcqs:

1. In a liquid-liquid extraction, 10 kg of a solution containing 2 kg of solute C and 8 kg of solvent A is brought into contact with 10 kg of solvent B. Solvent A and B are completely immiscible in each other whereas solute C is soluble in both the solvents. The extraction process attains equilibrium. The equilibrium relationship between the two phases is Y* = 0.9X, where Y* is the kg of C/kg of B and X is kg of C/kg of A. Choose the correct answer?

   A. The entire amount of C is transferred to solvent B
   B. Less than 2 kg but more than 1 kg of C is transferred to solvent B
   C. Less than 1 kg of C is transferred to B
   D. No amount of C is transferred to B

2. The individual mass transfer co-efficients (moles/m2s) for absorption of a solute from a gas mixture into a liquid solvent are, KL = 4.5 and KG = 1.5. The slope of the equilibrium line is 3. Which of the following resistance (s) is (are) controlling ?

   A. Liquid side
   B. Gas side
   C. Interfacial
   D. Both liquid and gas side

3. The individual mass transfer co-efficients (moles/m2s) for absorption of a solute from a gas mixture into a liquid solvent are, KL = 4.5 and KG = 1.5. The slope of the equilibrium line is 3. Which of the following resistance (s) is (are) controlling ?

   A. Liquid side
   B. Gas side
   C. Interfacial
   D. Both liquid and gas side

4. Solvent extraction is the terminology applied to the liquid-liquid extraction, which is preferred for the separation of the components of liquids, when____________________?

   A. Extracting solvent is cheaply & abundantly available
   B. One of the liquid components is heat sensitive
   C. Viscosity of liquid components is very high
   D. One of the liquid components has very high affinity towards the solvent

5. 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%

6. 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

7. 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

8. 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.

9. The dew point of an unsaturated gas-vapor mixture does not depend upon the _________________ of the mixture?

   A. Composition
   B. Temperature
   C. Total pressure
   D. All A, B. and C.

10. The dew point of an unsaturated gas-vapor mixture does not depend upon the ____________________ of the mixture?

    A. Composition
    B. Temperature
    C. Total pressure
    D. All A., B. and C.