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Mass Transfer

Mass Transfer
Liquid diffusivity is of the order of __________ cm² /second.

> 1
10-5 to 10-6
0.1
0.01

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Mass Transfer
Absorption (liquid-gas system) with evolution of heat as compared to isothermal absorption results in

Large minimum liquid to gas (L/G) ratio
Large number of trays
All of these
Decreased solute solubility

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Mass Transfer
The dew point of an unsaturated gas-vapor mixture does not depend upon the __________ of the mixture.

Temperature
Total pressure
Composition
All of these

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Mass Transfer
In a packed absorption tower, if the equilibrium and operating lines are both straight lines, then the ratio, HETP/HTUOG __________ the absorption factor.

Increases with increase in
Is one at unity value of
Neither A nor B
Both A and B

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Mass Transfer
When both the fluids flow concurrently in an absorber, the slope of the operating line is

-1
1
+ ve
- ve

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Mass Transfer
For a binary mixture with low relative volatility, continuous rectification to get pure products will require

High reflux ratio
Small cross-section column
Less number of trays
Low reflux ratio

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