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
Related Mcqs:
- 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 - _____________ is used as an ‘entrainer’ for the separation of acetic acid-water mixture by distillation?
A. Furfural
B. Benzol
C. Butyl acetate
D. Hexane - The relative volatility of a binary mixture at the Azeotropic composition is _______________________?
A. 1
B. > 1
C. 0
D. ∞ - 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 - An Azeotropic mixture is a ________________ mixture?
A. Binary
B. Ternary
C. Constant boiling point
D. None of these - The reason for preferring packed towers over plate towers in distillation practice is that the packed tower operation gives___________________?
A. Low pressure drop and high hold up
B. High pressure drop and low hold up
C. Low pressure drop and low hold up
D. High pressure drop and high hold up - Flooding in a distillation column is detected by a sharp ___________________?
A. Increase in Murphree plate efficiency
B. Decrease in pressure drop
C. Decrease in liquid hold up in the column
D. Increase in pressure drop - For the same process conditions, the reflux ratio of an unlagged distillation column___________________?
A. Decreases in winter
B. Increases in winter
C. Increases in summer
D. None of these - If the amount of the steam used in steam distillation is increased, the temperature of distillation__________________?
A. Increases
B. Decreases
C. Remains unchanged
D. Depends on relative volatility - 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
