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Mass Transfer

Mass Transfer
In case of gases, the binary diffusivity is proportional to (where, P = pressure)

√P
1/√P
P
1/P

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Mass Transfer
For a binary mixture with low relative volatility,

Use high pressure distillation
Use molecular distillation
Use steam distillation
An azeotrope may be formed during distillation

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Mass Transfer
Liquid diffusivity is of the order of __________ cm² /second.

0.1
10-5 to 10-6
0.01
> 1

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Mass Transfer
The vapour pressure exerted by the moisture contained in a wet solid depends upon the

Temperature
All of these
Nature of the solid
Nature of the moisture

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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

1
3
2

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Mass Transfer
Reboiler is considered as one theoretical plate, because

Vapour is recycled to the column
Of the assumption that vapour and liquid leaving the reboiler are in equilibrium
None of these
Reboiler itself contains one plate

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