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Mass Transfer

Mass Transfer
The slope of the operating line for a single component co-current absorber when plotted in terms of mole ratio units is

+ve
-ve
∞

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Mass Transfer
For a binary mixture with low relative volatility,

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

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Mass Transfer
The cooling effect in a cooling tower can be speeded up by

Reducing the barometric pressure
Reducing the humidity of the air
Increasing the air velocity and area of exposed wet surface
All of the listed here

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Mass Transfer
Selectivity of the solvent used in solvent extraction should be

< 1
> 1
1

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Mass Transfer
McCabe-Thiele method of binary distillation does not assume that the

Molar latent heats of all components are equal
Heat of mixing is negligible
None of these
Sensible heat changes are negligible compared with latent heat changes

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Mass Transfer
Overall efficiency of the distillation column is

Always more than the point efficiency
The ratio of number of actual plates to ideal plates
The ratio of number of ideal plates to actual plates
Same as the Murphree efficiency

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