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Mass Transfer

Mass Transfer
In liquid-liquid extraction, the number of phases at plait point is

3
4
1
2

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Mass Transfer
The cooling effect in a cooling tower can not be increased by

Increasing the air velocity over the wet surfaces
None of these
Lowering the barometric pressure
Reducing the humidity of entering air

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Mass Transfer
Molecular diffusivity of a liquid

Decreases with temperature
Is independent of temperature
May increase or decrease with temperature
Increases with temperature

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Mass Transfer
Weeping in a distillation column

Results due to very high gas velocity
Provides large interfacial surface for mass transfer
Results due to very low gas velocity
Increases tray efficiency

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Mass Transfer
COâ‚‚ can be absorbed by

Hot cupric oxide
Alumina
Heated charcoal
Cold Ca(OH)â‚‚

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Mass Transfer
Sodium bicarbonate is produced during soda ash manufacture using a __________ tower.

Baffle
Plate
None of these
Packed

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