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Mass Transfer

Mass Transfer
Leaching of sugar from sugar beets is done by

Dilute H₂SO₄
Hexane
Lime water
Hot water

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Mass Transfer
Sand is dried in foundaries in a___drier.

Fluidisedbed
Rotary
Spray
Vacuum

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

- ve
+ ve
1
-1

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Mass Transfer
With decrease in the throughput (compared with the design capacity) for a bubble cap distillation column, its efficiency

Increases
May increase or decrease ; depends on individual design
Remains same
Decreases

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Mass Transfer
The main reason for dividing a tall packed tower into series of small towers is to

Avoid channeling
Avoid flooding
Minimise the overall pressure drop
Reduce liquid hold up

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Mass Transfer
The mass transfer co-efficient for a solid sphere of radius 'a' dissolving in a large volume of quiescent liquid, in which D is the diffusivity of solute, is

D/2a
Dependent on the Reynolds number
Proportional to √D
D/a

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