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Mass Transfer

Mass Transfer
Sticky material can be dried in a __________ dryer.

Fluidised bed
Tray
Rotary
None of these

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Mass Transfer
The binary diffusivity in gases and liquids vary respectively as

T3/2 and √T
√T and T3/2
T3/2 and T
T and T3/2

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Mass Transfer
NSc/NPr is called the

Sherwood number
Psychrometric ratio
Stantan number
Lewis number

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

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

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Mass Transfer
Diffusivity in concentrated solutions differs from that in dilute solutions, because of the changes in

Degree of ideality of the solution
Both A & B
Neither A nor B
Viscosity with concentration

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Mass Transfer
Radioactive nuclear waste is treated in

Rotating-disc contactor
Mixer-settler extractor
Pulsed column extractor
Bollman extractor

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