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Mass Transfer

Mass Transfer
During drying operation, it is easier to remove the __________ moisture.

Unbound
Bound
Equilibrium
Critical

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Mass Transfer
The Hatta number is important in

Gas absorption without chemical reaction
Gas absorption with chemical reaction
Binary distillation
Multicomponent distillation

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Mass Transfer
In a distillation column, with increase in the reflux ratio, the heat removed in the cooler

Increases
Remains unaffected
Decreases
And the heat required in reboiler decreases

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Mass Transfer
At constant pressure, with increase of temperature, the dew point will

Increase/decrease ; depends on the temperature
Decrease
Remain unchanged
Increase

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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 )

T1.5
T3
T
√T

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Mass Transfer
Mass transfer co-efficient 'K' according to penetration theory varies with mass dif-fusivity as

D1.5
D
D0.5
1/D

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