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Mass Transfer

Mass Transfer
What is the reflux ratio at total reflux?

Zero
Infinity
Unity
Data insufficient

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Mass Transfer
Molecular distillation is

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

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Mass Transfer
Fenske equation determines the

Minimum number of theoretical plates
Optimum reflux ratio
Maximum number of ideal plates
Height of the distillation column

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Mass Transfer
For contacting a highly soluble gas with a liquid

Bubble the gas through liquid
None of the listed here
Spray the liquid on gas stream
Both of the options given here

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Mass Transfer
Prandtl number for water at 20°C is about

7
70
0.7
150

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

Decreases
Remains unchanged
Depends on relative volatility
Increases

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