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Mass Transfer

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

T²
√T
T
1/T

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Mass Transfer
The value of L/mG ratio for economical absorption operation ranges from

2.5 to 3.5
0.8 to 1.2
1.25 to 2.0
0.5 to 0.8

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Mass Transfer
In case of constant underflow extraction operation, the __________ at all solute concentration.

Neither A nor B
Both A & B
Ratio of the insoluble to solution is constant
Solids are drained to the same extent

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Mass Transfer
Which of the following binary systems is an example of a maximum boiling azeotrope?

Water-hydrochloric acid
Acetone-carbon disulphide
None of the listed here
Water-ethyl alcohol

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Mass Transfer
Azeotropism for ethyl alcohol-water system disappears by

Increasing pressure
No means
Increasing temperature
Decreasing pressure

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Mass Transfer
The reason for preferring packed towers over plate towers in distillation practice is that the packed tower operation gives

Low pressure drop and low hold up
High pressure drop and high hold up
Low pressure drop and high hold up
High pressure drop and low hold up

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