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Mass Transfer

Mass Transfer
In liquid-liquid extraction, the number of phases at plait point is

1
2
4
3

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Mass Transfer
Unsaturated air (with dry and wet bulb temperatures being 35 and 25°C respectively) is passed through water spray chamber maintained at 35°C. The air will be

Both A & B
Humidified
Cooled
Dehumidified

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Mass Transfer
Molecular distillation is

Very low pressure distillation
Both B and C
High temperature distillation
For heat-sensitive materials

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Mass Transfer
At __________ reflux, theoretical number of plates in a distillation coloumn is calculated using Fenske-Underwood equation.

Total
Maximum permissible
Minimum
Operating

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Mass Transfer
For experimental determination of mass transfer co-efficient by wetted wall tower, the mass transfer area is

Not required
Unknown
Calculated
Known

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Mass Transfer
If the path of liquid across the plate is very long as in case of large diameter tower, Murphree efficiency can be __________ percent.

100
< 100
> 100
None of these

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