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Mass Transfer

Mass Transfer
Surface renewal model of mass transfer was enunciated by

Toor and Marchello
Stefan
Danckwerts
Fick

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Mass Transfer
For the same feed, feed quality and separation (in a distillation column), with the increase of total pressure, the number of ideal plates will

Remain same
Increase
Decrease
Data insufficient, can't be predicted

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Mass Transfer
Diffusion in concentrated solutins differs from that in dilute solutions, because of the change in the __________ with the concentration of the solution.

Both A & B
Viscosity
Degree of ideality
Neither A nor B

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Mass Transfer
Packed column distillation is limited to the column __________ metres.

Height < 6
Diameter < 0.6
Both A & B
Neither A nor B

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Mass Transfer
Leaching of sugar from sugar beets is done by

Hexane
Lime water
Dilute H₂SO₄
Hot water

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Mass Transfer
Mass transfer co-efficient 'K' according to penetration theory varies with mass dif-fusivity as

D0.5
1/D
D
D1.5

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