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Mass Transfer

Mass Transfer
The slope of the operating line for a single component co-current absorber when plotted in terms of mole ratio units is

∞
-ve
+ve

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Mass Transfer
The apex of an equilateral-triangular coordinate (in ternary liquid system) represents a/an

Pure component
Insoluble binary system
Ternary mixture
Binary mixture

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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
Passes through a maximum
Remains unaffected
Decreases

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Mass Transfer
Mass transfer co-efficient 'K' according to penetration theory varies with mass dif-fusivity as

D0.5
1/D
D
D1.5

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

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

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Mass Transfer
With increase in gas rate, the number of transfer units, NtoG, for a fixed degree of absorption by a fixed amount of solvent

Remains unaffected
Decreases linearly
Decreases
Increases

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