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Mass Transfer

Mass Transfer
In a binary distillation column, if the feed contains 40 mole % vapour, the q line will have a slope of

-0.6
0.6
-1.5
1.5

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Mass Transfer
A natural draft cooling tower is filled with wooden grids, which covers about __________ percent of the tower height.

30-40
44119
70-80
90-100

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Mass Transfer
During constant rate drying period, vaporisation rate per unit drying surface area

Increases with time
Does not affect the moisture content of the wet solid
Does not change with time
Decreases with time

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Mass Transfer
Acetic acid will be most economically separated from a dilute solution of acetic acid in water by

Absorption
Solvent extraction
Evaporation
Continuous distillation

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Mass Transfer
The value of NA/(NA + NB) for steady state molecular diffusion of gas 'A' through non-diffusing gas 'B' is

0.5
1
∞
2

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Mass Transfer
Mass transfer co-efficient is directly proportional to DAB according to the __________ theory.

None of these
Film
Surface-renewal
Penetration

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