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Mass Transfer

Mass Transfer
According to the film theory of mass transfer, the mass transfer co-efficient is proportional to (where, D = molecular diffusivity)

D
D0.5
D2
1/D

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Mass Transfer
In case of an unsaturated mixture of gas and vapor, the percentage saturation is __________ its relative saturation.

Higher than
Equal to
Lower than
Either A or B, depends on the mixture composition

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

D ∝ T1.5
D ∝ T2
D ∝ T0.5
D ∝ T

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Mass Transfer
Swenson-Walker crystalliser is a __________ unit

Continuous
Cooling (adiabatic)-cum-evaporation
Semi-batch
Batch

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Mass Transfer
With increase in the concentration of the adsorbate, the integral heat of adsorption

Remains unchanged
Increases
May increase or decrease ; depends on the type of adsorbate
Decreases

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

D1.5
1/D
D
D0.5

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