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Mass Transfer

Mass Transfer
An azeotropic mixture is a __________ mixture.

Ternary
Constant boiling point
Binary
None of these

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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 ∝ 1/P1.5
D ∝ P0.5

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Mass Transfer
The commonly used solvent in supercritical extraction is

Water
Methyl ethyl ketone
Carbon tetrachloride
Carbon dioxide

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Mass Transfer
In a packed absorption tower, if the equilibrium and operating lines are both straight lines, then the ratio, HETP/HTUOG __________ the absorption factor.

Increases with increase in
Both A and B
Is one at unity value of
Neither A nor B

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Mass Transfer
Lewis number (Le) is

Pr x St
Sh x Pr
Sc x Pr
St x Sh

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Mass Transfer
Diameter of raschig rings used in packed tower in industry is normally around __________ inches.

2
18
8
12

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