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Mass Transfer

Mass Transfer
__________ column is used in gas absorption process.

Packed
Seive/perforated tray
Wetted wall
Bubble cap

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Mass Transfer
Which of the following binary systems is an example of a maximum boiling azeotrope?

None of the listed here
Acetone-carbon disulphide
Water-hydrochloric acid
Water-ethyl alcohol

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Mass Transfer
A binary mixture of benzene and cyclohexane is separated by

Flash vaporisation
Ordinary distillation
Extractive distillation
Solvent extraction

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Mass Transfer
For a fixed number of ideal stages in a distillation column, as the reflux ratio is increased, the difference in composition between the top and bottom product streams

Increases
Decreases
Remains unaffected
Passes through a maximum

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Mass Transfer
The mass transfer co-efficient for a solid sphere of radius 'a' dissolving in a large volume of quiescent liquid, in which D is the diffusivity of solute, is

Dependent on the Reynolds number
D/2a
Proportional to √D
D/a

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Mass Transfer
Which of the following employs an accessory known as 'drift eliminator' ?

Rotary dryer
Mechanical draft cooling tower
Multiple effect evaporator
Rotating disc contactor

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