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Mass Transfer

Mass Transfer
__________ column is used in gas absorption process.

Packed
Seive/perforated tray
Wetted wall
Bubble cap

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Mass Transfer
High pressure at the bottom of a distillation tower handling heat sensitive materials results in

Increased relative volatility
Erosion of the tower
Very efficient operation
Thermal decomposition of bottoms

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Mass Transfer
For the case of flow of air past a wet bulb thermometer (air water vapour system), the approximate value of Hâ‚‚/ky.Cz is around

0.6
0.72
1
0.24

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Mass Transfer
The boiling points of pure components of a binary system __________ with increase in total pressure of the system.

Decreases
Increases
May increase or decrease, depends on the system
Remains unchanged

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Mass Transfer
Though, theoretically the adsorption & desorption isotherms is expected to coincide but sometimes at least a part of the isotherms does not coincide and this phenomenon is known as adsorption hysterisis. In such cases, the desorption equilibrium pressure is __________ that obtained for adsorption.

Same as
Lower than
Either same or higher than
Higher than

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Mass Transfer
During dehumidification of unsaturated air wet bulb temperature & partial pressure of vapor are not constant. However, during evaporative cooling process with recirculated water supply, the __________ remains constant.

Partial pressure of water vapor
Wet bulb temperature
Relative humidity
None of these

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