Mass Transfer
Which of the following is an undesirable characteristic for the solvent used in gas absorption?

Low viscosity
Low vapor pressure
High gas solubility
None of these

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Mass Transfer
Flights in a rotary dryer are provided to

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

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