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Mass Transfer

Mass Transfer
In case of liquids, the binary diffusivity is proportional to (where, T = temperature)

T²
T
√T
1/T

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Mass Transfer
Which of the following unit operations makes use of Thiele-Geddes equation?

Solid-liquid extraction
Multicomponent absorption with chemical reaction
Liquid-liquid extraction
Multicomponent distillation

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Mass Transfer
The change in enthalpy, when a unit quantity of gas is absorbed by relatively large quantity of adsorbent (on which a definite concentration of the adsorbed gas already exists) is termed as the

None of these
Heat of wetting
Differential heat of adsorption
Integral heat of adsorption

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Mass Transfer
The temperature of water cooled in cooling tower is always __________ temperature of entering air.

Less than the wet bulb
Equal to the wet bulb
Equal to the dry bulb
More than the wet bulb

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

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

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Mass Transfer
The most common packing used in industrial operations is __________ rings.

Raschig
Cross-partition
Lessing
Single spiral

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