___________________ extractor uses centrifugal force for separating the two phases?

Related Mcqs:

1. Polar organic compounds are normally used as separating agents for the azeotropic and extractive distillation. Which of the following is the most important factor to be considered for the choice of the separating agent for extractive distillation ?

   A. Cost
   B. Availability
   C. Toxicity
   D. Selectivity

2. Mass transfer rate between two fluid phases does not necessarily depend on the ______________ of the two phases?

   A. Chemical properties
   B. Physical properties
   C. Degree of turbulence
   D. Interfacial area

3. _____________ extractor is used for the concentration of radioactive nuclear waste?

   A. Pulsed column
   B. Sieve plate
   C. Mixer-settler
   D. Bollman

4. _______________ extractor is used for the concentration of radioactive nuclear waste?

   A. Pulsed column
   B. Sieve plate
   C. Mixer-settler
   D. Bollman

5. In a counter-current extractor, as the axial mixing increases, the extraction efficiency______________________?

   A. Increases
   B. Decreases
   C. Remains unchanged
   D. Depends on the pressure of the system

6. _______________ diffusion is used for separating the isotopes of methane ?

   A. Thermal
   B. Pressure
   C. Concentration
   D. Force

7. Flash distillation is suitable for separating the constituents of a binary system, which _____________________?

   A. Form minimum boiling azeotrope
   B. Have very wide boiling points
   C. Have very close boiling points
   D. Form constant boiling azeotrope

8. In case of absorption & stripping, the interface of the liquid & gas phases are present in equilibrium, when the diffusional resistance of _______________ is zero?

   A. Interface
   B. Gas phase
   C. Liquid phase
   D. All A , B. & C.

9. 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

10. In liquid-liquid extraction, the number of phases at plait point is __________________?

    A. 1
    B. 2
    C. 3
    D. 4