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

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

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Mass Transfer
Which of the following processes is not an example of adsorption applied to gaseous separations?

Recovery of valuable solvent vapors from dilute mixture with air and other gases
Decolouration of yellow glycerene
Removal of objectionable odour and impurities from industrial gases
Dehumidification of air and gas

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Mass Transfer
Bollman extractor

Is a centrifugal extractor
Is a static bed leaching equipment
Employs only counter-current extraction
Is used for extraction of oil from oilseed

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Mass Transfer
Dew point of an air-water vapor mixture

At constant humidity & total pressure is fixed
Decreases with decrease in pressure
All of the listed here
Corresponding to any point on the humidity chart is obtained by projecting a line through this point parallel to the temperature axis and to the saturation curve

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