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Mass Transfer

Mass Transfer
Dorr thickener is an equipment used for

Clarification
Sedimentation
Leaching
Classification

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Mass Transfer
Separation of two volatile liquids by distillation makes use of their

Density difference
Selectivity
Solubility
Relative volatility

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Mass Transfer
Degree of freedom for leaching and solvent extraction process is

3
1
2

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Mass Transfer
The value of NA/(NA + NB), for steady state equimolal counter diffusion of two gases 'A' and 'B' is

∞
2
1
0.5

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

D
1/D
D1.5
D0.5

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Mass Transfer
Which of the following is an undesirable property in a tower packing?

Large surface per unit volume
Low weight per unit volume
Large weight of liquid retained
Large free cross-section

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