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Mass Transfer

Mass Transfer
The value of Lewis number (Le = Sc/Pr) for air-water vapour system is around

1
0.24
3.97
600

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Mass Transfer
Moisture in a solid exerting an equilibrium vapour pressure equal to that of the pure liquid at the same temperature is called the __________ moisture.

Unbound
Bound
Critical
Free

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Mass Transfer
For a fixed number of ideal stages in a distillation column, as the reflux ratio is increased, the difference in composition between the top and bottom product streams

Increases
Passes through a maximum
Decreases
Remains unaffected

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

2
1
3

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Mass Transfer
Hydrogenation of oil is carried out in a/an __________ in Vanaspati manufacturing plant.

Bubble cap column
Packed tower
Agitated vessel
Sieve tray column

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Mass Transfer
During sensible cooling process

Relative humidity increases
Wet bulb temperature decreases
Relative humidity decreases
Both B and C

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