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Mass Transfer

Mass Transfer
Stefan's law describes the mass transfer by

Diffusion
Bulk flow
Neither A nor B
Both A & B

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Mass Transfer
For a binary mixture distillation process, the degree of freedom is 2. However, if the pressure is fixed in this process, the number of independent variables in this process will be

3
2
1

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Mass Transfer
Which of the following is considered equivalent to one theoretical stage in Mc-Cabe Thiele's method?

Reboiler
Partial condenser
Both B and C
Total condenser

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Mass Transfer
Heat sensitive materials with very high latent heat of vaporisation may be economically separated using

Absorption
Distillation
Liquid extraction
Evaporation

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

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

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Mass Transfer
Which of the following processes is followed by unsaturated air (with dry bulb temperature 12°C and relative humidity 47%) passing through water spray washer (temperature of water being constant at 40°C?

Humidification only
Both heating and humidification
Heating only
Evaporative cooling

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