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Mass Transfer

Mass Transfer
Desirable value of absorption factor in an absorber is

< 1
> 1
0.5
1

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Mass Transfer
Batch tray dryers suffers from the disadvantage of

Non-uniform & low production rate
High maintenance cost
All of the listed here
High labour cost & low heat economy

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Mass Transfer
Overall efficiency of the distillation column is

Same as the Murphree efficiency
Always more than the point efficiency
The ratio of number of ideal plates to actual plates
The ratio of number of actual plates to ideal plates

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Mass Transfer
The adiabatic saturation curve for a vapour-gas mixture is

Straight line
Slightly concave downward
Slightly concave upward
None of these

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Mass Transfer
For a distillation column operating at minimum reflux, the

Concentration of liquid and vapour leaving a plate will be same
None of these
Reflux ratio will be maximum
Number of plates required will be maximum

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Mass Transfer
For which of the following unit operations, Lewis number is of significance?

Humidification
Binary distillation
Gas absorption
Adsorption

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