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Mass Transfer

Mass Transfer
At what percentage (by volume) of alcohol composition, it forms an azeotrope with water?

91.5
95
99
90

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Mass Transfer
If the amount of the steam used in steam distillation is increased, the temperature of distillation

Remains unchanged
Depends on relative volatility
Increases
Decreases

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Mass Transfer
Which of the following unit operations makes use of Thiele-Geddes equation?

Solid-liquid extraction
Multicomponent absorption with chemical reaction
Multicomponent distillation
Liquid-liquid extraction

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Mass Transfer
Use of packed towers for distillation is generally limited to the

Small sizes
High pressure operation
Vacuum distillation
Multicomponent distillation

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Mass Transfer
The dew point of an unsaturated gas-vapor mixture does not depend upon the __________ of the mixture.

All of these
Temperature
Composition
Total pressure

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Mass Transfer
NSc/NPr is called the

Stantan number
Sherwood number
Psychrometric ratio
Lewis number

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