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Mass Transfer

Mass Transfer
If f = moles of vapour present per mole of feed, then the slope of feed line is

- (f - 1)/f
(1 - f)/f
- f/(1 - f)
- 1/f

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Mass Transfer
'ADDUCTS' and 'CLATHRATES' are used in case of

None of these
Crystallisation
Absorption
Extractive distillation

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Mass Transfer
Make up water is required in a cooling tower to replace the water lost by

Drift
Blowdown and leakage
Evaporation
All of these

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Mass Transfer
In a counter-current extractor, as the axial mixing increases, the extraction efficiency

Depends on the pressure of the system
Increases
Decreases
Remains unchanged

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

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

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Mass Transfer
_______ number indicates the ratio of the rates of the heat and mass transfer incase of a cooling tower.

Lewis
Peclet
Stanton
Sherwood

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