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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
In case of __________ distillation, a solvent is added to alter the relative volatility of the mixture to be separated.

Flash
Extractive
Molecular
Azeotropic

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Mass Transfer
In extractive distillation, solvent is

Of high viscosity to give high tray efficiency
Of high volatility
Present in overhead stream
Added to alter the relative volatility of the mixture

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Mass Transfer
Flooding in a vapor-liquid contacting equipment occurs in a tray, when the pressure drop through a tray is __________ the liquid head available in the downcomer.

Very much less
More than
Same as
Less than

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Mass Transfer
For a binary mixture with low relative volatility,

An azeotrope may be formed during distillation
Use molecular distillation
Use steam distillation
Use high pressure distillation

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Mass Transfer
Schimdt number and Lewis number for pure air at atmospheric conditions are respectively

1 and 0
0 and ≈ 1
< 1 and ≈ 1
>1 and ≈ 1

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