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Mass Transfer

Mass Transfer
CO₂ can be absorbed by

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

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Mass Transfer
If the specific heats of a gas and a vapor are 0.2KJ/Kg.°K and 1.5 KJ/Kg.°K respectively, and the humidity is 0.01; the humid heat in KJ/°Kg. is

0.215
0.31
0.017
0.107

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Mass Transfer
With increase in gas rate, the number of transfer units, NtoG, for a fixed degree of absorption by a fixed amount of solvent

Remains unaffected
Decreases
Decreases linearly
Increases

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Mass Transfer
Wet bulb and dry bulb temperatures becomes identical at __________ percent saturation curve.

None of these
50
78
100

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Mass Transfer
Mass transfer co-efficient is directly proportional to DAB0.5, according to __________ theory.

None of these
Penetration
Surface renewal
Film

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Mass Transfer
Which of the following gas-liquid contacting devices incurs the least pressure drop for a particular duty?

Bubble cap tower
Grid tray tower
Perforated tray tower
Wetted wall tower

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