Mass Transfer
Flights in a rotary dryer are provided to

None of these
Increase the residence time of the solid
Reduce the residence time of solid
Lift and shower the solids thus exposing it thoroughly to the drying action of the gas

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

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

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