Related Questions

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
Packed column distillation is limited to the column __________ metres.
A [

A. Height

B. Diameter

B Both A & B
C Neither A nor B
A distillation column with N plates is being operated under normal conditions. At some point of time, the operation is shifted to total reflux condition (i.e., no product and residue are being withdrawn and feed to the column is stopped). At the new steady state,
A Composition of vapors and that of liquid do not vary throughout the column
B Reboiler load and condenser load are minimum
C The top and bottom compositions are unchanged with and without total reflux
D The top and bottom compositions correspond to the maximum enrichment available
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
Air entrainment in the concrete increases
A Workability
B Strength
C The effects of temperature variations
D The unit weight
In case of evaporators, liquid entrainment results primarily due to
A High vacuum in the evaporator
B High evaporation rate
C Foaming of the solution
D High heat transfer rate
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
According to Euler's column theory, the crippling load for a column of length (l) fixed at both ends is __________ the crippling load for a similar column hinged at both ends.
A Equal to
B Two times
C Four times
D Eight times
-Column row+Column row+Column row এই ফরমূলা কিসের?
A ভাগ এর
B যোগ এর
C গুণ এর
D বিয়োগ এর
Which of the following is used to set the diameter of the distillation column?
A Number of theorectical plates
B Static submergence
C Allowable vapour velocity
D Length of straight rectangular weir on cross-flow tray

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