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Mass Transfer

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

1/T
T
√T
T²

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Mass Transfer
The relative volatility of a binary mixture at constant temperature __________ the total pressure.

Is independent of
Increases with increase in
Decreases with increase in
None of these

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Mass Transfer
The value of Lewis number (Le = Sc/Pr) for air-water vapour system is around

3.97
0.24
600
1

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Mass Transfer
The interfacial area per unit volume of dispersion, in a gas-liquid contactor, for fractional hold up of gas = 0.1 and gas bubble diameter = 0.5 mm is given by (in m²/m³)

50
500
1000
100

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Mass Transfer
In a counter-current extractor, as the axial mixing increases, the extraction efficiency

Increases
Depends on the pressure of the system
Decreases
Remains unchanged

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Mass Transfer
Percentage saturation is __________ the relative saturation.

Not related to
Always greater than
None of these
Always smaller than

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