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Mass Transfer

Mass Transfer
What is the reflux ratio at total reflux?

Zero
Unity
Data insufficient
Infinity

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Mass Transfer
In physical terms, Schmidt number means

Thermal diffusivity/momentum diffusivity
Momentum diffusivity/mass diffusivity
Thermal diffusivity/mass diffusivity
Mass diffusivity/thermal diffusivity

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Mass Transfer
Flooding in a vapor-liquid contacting equipment occurs in a tray, when the pressure drop through a tray is __________ the liquid head available in the downcomer.

Same as
Very much less
More than
Less than

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Mass Transfer
Pick out the system with maximum boiling azeotrope at 1 atm.

Benzene-ethyl alcohol
Acetone chloroform
None of these
Ethyl alcohol-water

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Mass Transfer
In a binary distillation column, if the feed contains 40 mole % vapour, the q line will have a slope of

-1.5
0.6
1.5
-0.6

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Mass Transfer
Packed column distillation is limited to the column __________ metres.

Diameter < 0.6
Both A & B
Height < 6
Neither A nor B

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