Related Questions

The distillation carried out in such a way that the liquid with the lowest boiling point is first evaporated and re-condensed, then the liquid with the next higher boiling point is then evaporated and re-condensed, and so on until all the available liquid fuels are separately recovered in the sequence of their boiling points. Such a process is called
A Cracking
B Fractional distillation
C Full distillation
D Carbonisation
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
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 amount of steam required per unit quantity of distillate in case of steam distillation will be reduced by
A Raising the temperature
B Lowering the total pressure
C Both A & B
D Neither A nor B
In case of steam distillation, the steam leaving the liquid is not completely saturated with distillate vapour, because
A Temperature is less
B Total pressure is less
C Mixing of steam with the material being vaporised is not so intimate as to result in equilibrium condition
D Saturated steam is used for steam distillation
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
A steam turbine, in which a part of the steam after partial expansion, is used for process heating and the remaining steam is further expanded for power generation, is known as
A Back pressure turbine
B Pass out turbine
C Low pressure turbine
D Impulse turbine
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
__________ is used as an 'entrainer' for the separation of acetic acid-water mixture by distillation.
A Furfural
B Benzol
C Butyl acetate
D Hexane
In a steam engine, superheated steam from the boiler is fed into the steam chest at a pressure of
A 10 atmospheres
B 20 atmospheres
C 30 atmospheres
D 40 atmospheres

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