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Mass Transfer

Mass Transfer
CO₂ can be absorbed by

Cold Ca(OH)₂
Alumina
Hot cupric oxide
Heated charcoal

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Mass Transfer
The efficiency of a plate column will be maximum, when the flow is ideal __________ the plate.

Above
Both A & B
Across
Neither A nor B

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Mass Transfer
The caking of crystals can be prevented by

Maintaining low critical humidity
Both A and C
Coating the product with inert material
Maintaining high critical humidity

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Mass Transfer
The wet and 'dry bulb temperature for a vapour-gas mixture are 25°C and 30°C respectively. If the mixture is heated to 45°C at constant pressure, the wet bulb temperature will be __________ °C.

25
> 25
-25
< 25

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Mass Transfer
In extraction, as the temperature increases, the area of hetrogeneity (area covered by binodal curve)

Decreases
Remains unchanged
Increases
None of these

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Mass Transfer
Which one of the following devices is not used for both the absorption as well as the liquid-liquid extraction processes?

Spray towers
Packed towers
Plate towers
Wetted wall columns

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