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Mass Transfer

Mass Transfer
Pore size of the molecular seive 5A is __________ mm.

0.5
50
0.05
5

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Mass Transfer
Weeping in a distillation column

Results due to very low gas velocity
Increases tray efficiency
Results due to very high gas velocity
Provides large interfacial surface for mass transfer

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Mass Transfer
Reboiler is considered as one theoretical plate, because

Of the assumption that vapour and liquid leaving the reboiler are in equilibrium
Reboiler itself contains one plate
None of these
Vapour is recycled to the column

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Mass Transfer
Which of the following is the most suitable for extraction in a system having very low density difference?

Pulsed extractor
Mixer-settler extractor
Packed extraction tower
Centrifugal extractor

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Mass Transfer
With increase in the mass velocity of the gas, the rate of drying during the constant rate period __________ , if the conduction and radiation through the solid are negligible.

Increases
Increases linearly
Remains same
Decreases

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

Temperature
All of these
Composition
Total pressure

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