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Mass Transfer

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

-1
+ ve
- ve
1

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Mass Transfer
Mass transfer rate between two fluid phases does not necessarily depend on the __________ of the two phases.

Degree of turbulence
Physical properties
Chemical properties
Interfacial area

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Mass Transfer
The suitable evaporator for concentration of foaming liquids is a __________ evaporator.

Falling film
Short tube
Vacuum
Long tube

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Mass Transfer
The Schmidt number which is defined as, μ/ρ D, is the ratio of the

Thermal diffusivity to the mass diffusivity
Momentum diffusivity to the thermal diffusivity
None of these
Momentum diffusivity to the mass dif-fusivity

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Mass Transfer
Which of these columns incurs the lowest pressure drop?

Pulse column
Bubble plate column
Packed column (with stacked packing)
Packed column (with dumped packing)

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Mass Transfer
In stripping section of continuous distillation column, the

None of these
Vapour is stripped of low boiler
Liquid is stripped of high boiler
Liquid is enriched with high boiler

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