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Mass Transfer

Mass Transfer
The value of Lewis number (Le = Sc/Pr) for air-water vapour system is around

1
3.97
600
0.24

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Mass Transfer
Mass transfer co-efficient varies as DAB0.5, according to the __________ theory.

Penetration
Surface renewal
Film
None of these

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Mass Transfer
At a given equilibrium pressure, with increase in temperature, the concentration of adsorbed gas on solid adsorbant

Increases
Decreases
Increases exponentially
Remains unchanged

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Mass Transfer
Which of the following is a suitable absorbent for removal of H₂S from natural gas?

Dilute
Hot water
Monoethanol amine (MEA)
Vetrocoke solution

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Mass Transfer
__________ extractor is used for the concentration of radioactive nuclear waste.

Pulsed column
Mixer-settler
Seive plate
None of the listed here

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Mass Transfer
The Reynolds number of the liquid was increased 100 fold for a laminar falling film used for gas-liquid contacting. Assuming penetrating theory is applicable, the fold increase in the mass transfer co-efficient (Kc) for the same sytem is

10
1
100
5

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