Related Questions

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
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
When the mixture to be distilled has a very high boiling point and the product material is heat sensitive, the separation technique to be used is __________ distillation.
A Continuous
B Steam
C Azerotropic
D None of these
The-relative volatility for separation of a non-ideal binary mixture by distillation should be
A 0
B 1
C > 1
Vacuum maintained in the vacuum distillation tower of the crude distillation plant is about __________ mm Hg (absolute).
A 5-10
B 30-80
C 150-250
D 350-400
A mixture contains 2/5 of element A and 3/5 of element B. When 5ml of A is added to the mixture, the proportion of B in the mixture changes to 1/5. What amount of A was originally present in the mixture before the addition was made ?
A 1ml
B 1.5ml
C 2.5ml
D 6ml
A jar contains a mixture of oil and water in the ratio 22 :3 . 50 litres of the mixture was taken out and 25 litres of water was added to it. If water was 34% in the resultant mixture, what was the initial quantity of the mixture (in litres ) in the jar?
A 175
B 150
C 75
D 125
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
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
Steam distillation is used for separation of high boiling
A Substances from non-volatile impurities
B Volatile impurity from still higher boiling substances
C Both A & B
D Neither A nor B

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