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Mass Transfer

Mass Transfer
The diffusivity (D) in a binary gas mixture is related to the pressure (P) as

D ∝ 1/P1.5
D ∝ 1/P
D ∝ 1/P0.5
D ∝ P0.5

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Mass Transfer
Drift in a cooling tower is

Desirable
All of these
Dependent on the water lost by evaporation
The water entrained by the circulating air

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Mass Transfer
The dew point of a saturated gas phase equals the __________ temperature.

None of these
Wet bulb
Gas
Room

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

1/T
√T
T²
T

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Mass Transfer
Raschig ring made of procelain cannot be used for treating concentrated

Sulphuric acid
Alkalis
Hydrochloric acid
Nitric acid

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Mass Transfer
Which of the following quantities need not be fixed before starting the design of a co-current absorber?

None of the listed here
Flow rate of entering liquid
Heat gain or loss
Flow rate of gas

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