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Mass Transfer

Mass Transfer
At the boiling point of the liquid at the prevailing pressure, the saturated absolute humidity becomes

?
None of these
1

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

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

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Mass Transfer
Which of the following operations does not involve leaching?

Dissolving pharmaceutical products from bark or roots
Dissolving sugar from the cells of the beet
Removing nicotine from its water solution by kerosene
Dissolving gold from ores

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Mass Transfer
According to the Fenske equation, what will be the minimum number of plates required in a distillation column to separate an equimolar binary mixture of components A and B into an overhead fraction containing 99 mol% A and a bottom fraction containing 98 mol% B? Assume that relative volatility (αAB = 2) does not change appreciably in the coloumn.

10
8
6
12

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Mass Transfer
For a distillation column operating at minimum reflux, the

Number of plates required will be maximum
Reflux ratio will be maximum
None of these
Concentration of liquid and vapour leaving a plate will be same

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Mass Transfer
In which of the following unit operations, the selectivity is an important parameter?

None of these
Absorption
Solvent extraction
Distillation

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