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Mass Transfer

Mass Transfer
__________ column is preferred to be used, when a high liquid hold up is required in a reactor for gas-liquid reaction.

Bubble
Spray
Packed
Tray

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Mass Transfer
Air initially at 101. 3 kPa and 40°C and with a relative humidity of 50%, is cooled at constant pressure to 30°C. The cooled air has a

Higher relative humidity
Higher wet bulb temperature
Higher absolute (specific) humidity
Higher dew point

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Mass Transfer
The drying time between fixed moisture content within diffusion controlled 'falling rate period' is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid )

√T
T³
T
T²

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Mass Transfer
Selectivity of the solvent used in solvent extraction should be

1
< 1
> 1

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Mass Transfer
The recovery of pencillin from the acidified fermentation broth is done by

Liquid extraction
Evaporation
Absorption
Distillation

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Mass Transfer
A slurry is to be dried to produce flaky solid. Which dryer would you recommend?

Dielectric dryer
Rotary dryer
Spray dryer
Drum dryer

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