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 ?

Related Mcqs:

1. In extractive distillation, solvent is_____________________?

   A. Added to alter the relative volatility of the mixture
   B. Of high volatility
   C. Present in overhead stream
   D. Of high viscosity to give high tray efficiency

2. Entrainer used in Azeotropic distillation should____________________?

   A. Form a low boiling azeotrope with one of the constituents of the mixture
   B. Form a new azeotrope of low relative volatility with one of the constituents of the mixture
   C. Have high latent heat of vaporisation
   D. Have high viscosity to provide high tray efficiency

3. 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

4. Solvent used in extractive distillation_________________________?

   A. Is of low volatility
   B. Forms a low boiling azeotrope
   C. Forms a high boiling azeotrope
   D. Does not alter the relative volatility of the original components

5. Solvent used in extractive distillation___________________?

   A. Changes the relative volatility of the original components
   B. Should be of high volatility
   C. Should form azeotropes with the original components
   D. All A., B. and C.

6. The relative volatility of a binary mixture at the Azeotropic composition is _______________________?

   A. 1
   B. > 1
   C. 0
   D. ∞

7. In Azeotropic mixture, the equilibrium vapour composition is____________________?

   A. More than liquid composition
   B. Less than liquid composition
   C. Same as liquid composition
   D. Independent of pressure

8. An Azeotropic mixture is a ________________ mixture?

   A. Binary
   B. Ternary
   C. Constant boiling point
   D. None of these

9. Most important factor to be considered in the selection of packings for absorbers is the ______________ of packing?

   A. Size
   B. Durability
   C. Porosity
   D. Cost

10. Most important factor to be considered in the selection of packings for absorbers is the ______________ of packing?

    A. Size
    B. Durability
    C. Porosity
    D. Cost