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Mass Transfer

Mass Transfer
The diffusivity (D) in a binary gas mixture is related to the pressure (P) as

D ∝ 1/P0.5
D ∝ 1/P
D ∝ P0.5
D ∝ 1/P1.5

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Mass Transfer
With increase in temperature, the mutual solubility of two liquids

Decreases exponentially
Increases
Remains unchanged
Decreases

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Mass Transfer
Schimdt number and Lewis number for pure air at atmospheric conditions are respectively

0 and ≈ 1
>1 and ≈ 1
1 and 0
< 1 and ≈ 1

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Mass Transfer
__________ column is used in gas absorption process.

Seive/perforated tray
Bubble cap
Packed
Wetted wall

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Mass Transfer
______ extractor uses centrifugal force for separating the two phases.

None of the listed here
Treybal
Podbielniak
Schiebel

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Mass Transfer
Mass transfer co-efficient of liquid is

Affected much less by temperature than that for gases
None of these
Not affected by the temperature
Affected more by temperature than that for gases

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