Mass Transfer
The binary diffusivity in gases at atmospheric conditions is about

10-9 cm/sec
10-1 cm²/sec
10-3 sec/cm
10-4 cm²/seC₂

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

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

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