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Mass Transfer

Mass Transfer
If Rm is the minimum reflux ratio, the optimum reflux ratio may be around __________ Rm.

1.2 to 1.5
3 to 4
2.5 to 3
5

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Mass Transfer
Lewis number (Le) is

Sc x Pr
Sh x Pr
St x Sh
Pr x St

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Mass Transfer
Boiling point diagram is

A plot of temperature vs. vapour composition
A plot of temperature vs. liquid composition
Affected by pressure
Not affected by pressure

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Mass Transfer
During bottling of cold drinks (e.g. Pepsi), the main resistance to mass transfer for the absorption of carbon dioxide in water lies in the

None of these
Gas film
Liquid-gas interface
Liquid film

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Mass Transfer
Mass transfer co-efficient varies as DAB0.5, according to the __________ theory.

Penetration
None of these
Film
Surface renewal

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Mass Transfer
Azeotropism for ethyl alcohol-water system disappears by

Increasing pressure
Decreasing pressure
No means
Increasing temperature

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