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Mass Transfer

Mass Transfer
The value of L/mG ratio for economical absorption operation ranges from

2.5 to 3.5
1.25 to 2.0
0.5 to 0.8
0.8 to 1.2

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Mass Transfer
The rough value of diffusion co-efficient of water vapor into air at 25°C may be about __________ cm²/sec.

0.25
2.5
0.0025
1.25

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Mass Transfer
In case of physical adsorption, the difference between heat of adsorption and heat of normal condensation is

Zero
Equal to the heat of formation of surface compound
Called integral heat of adsorption
Equal to the heat of wetting

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Mass Transfer
The binary diffusivity in gases does not depend upon the

None of the listed here
Pressure
Temperature
Nature of the components

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Mass Transfer
Tea percolation employs

None of these
Absorption
Leaching
Liquid-liquid extraction

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Mass Transfer
Absorption accompanied with chemical reaction is exemplified by the absorption of

SO₂ in alkaline solution
All of these
Ammonia in water
Benzol present in coke oven gas by wash oil

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