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Mass Transfer

Mass Transfer
Surface renewal model of mass transfer was enunciated by

Danckwerts
Fick
Stefan
Toor and Marchello

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Mass Transfer
Batch tray dryers suffers from the disadvantage of

High labour cost & low heat economy
Non-uniform & low production rate
All of the listed here
High maintenance cost

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Mass Transfer
Pick out the system with maximum boiling azeotrope at 1 atm.

Ethyl alcohol-water
None of these
Acetone chloroform
Benzene-ethyl alcohol

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Mass Transfer
Degree of freedom for leaching and solvent extraction process is

1
2
3

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Mass Transfer
Weight of 1 m³ of humid air as compared to 1 m³ of dry air, under the same conditions, is

More
Unpredictable
Same
Less

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Mass Transfer
__________ diffusion is used for separating the isotopes of methane.

Concentration
Pressure
Force
Thermal

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