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MASS TRANSFER

Mass Transfer
The binary diffusivity in gases does not depend upon the

Nature of the components
Pressure
None of the listed here
Temperature

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Mass Transfer
According to the Fenske equation, what will be the minimum number of plates required in a distillation column to separate an equimolar binary mixture of components A and B into an overhead fraction containing 99 mol% A and a bottom fraction containing 98 mol% B? Assume that relative volatility (αAB = 2) does not change appreciably in the coloumn.

12
8
10
6

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Mass Transfer
Ammonia present in the coke oven gas is removed by washing with

Dilute HCl
Ethanolamine
Caustic solution
Dilute ammoniacal liquor

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Mass Transfer
Which of the following quantities need not be fixed before starting the design of a co-current absorber?

Flow rate of gas
Heat gain or loss
Flow rate of entering liquid
None of the listed here

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Mass Transfer
In azeotropic mixture, the equilibrium vapour composition is

More than liquid composition
Same as liquid composition
None of the listed here
Less than liquid composition

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