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Mass Transfer

Mass Transfer
What is the reflux ratio at total reflux?

Infinity
Zero
Data insufficient
Unity

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Mass Transfer
Diameter of raschig rings used in packed tower in industry is normally around __________ inches.

8
18
12
2

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Mass Transfer
Equilibrium-moisture curves of different solids

Depend on the humidity of the gas
Are same
Are different
None of these

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Mass Transfer
Chemisorption compared to physical absorption has

None of these
Lower adsorption rate
Lower capacity of the solvent for the solute gas
Increased utilisation of stagnant zones of the liquid phase

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Mass Transfer
Flash distillation is suitable for the separation of components

Which form minimum boiling azeotrope
Having very close boiling points
Which form maximum boiling azeotrope
Having very wide boiling points

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Mass Transfer
The drying time between fixed moisture contents within the 'constant rate period' is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid )

T3
T1.5
√T
T

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