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Mass Transfer

Mass Transfer
Dorr thickener is an equipment used for

Classification
Leaching
Sedimentation
Clarification

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Mass Transfer
Rate of leaching increases with increasing

Temperature
Size of the solid
Viscosity of solvent
Pressure

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Mass Transfer
Unit of molal diffusivity is

Gm moles/cm². sec
Gm moles/cm. sec
Gm moles/cm² . sec
Cm²/sec gm . mole

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Mass Transfer
If f = moles of vapour present per mole of feed, then the slope of feed line is

- 1/f
(1 - f)/f
- f/(1 - f)
- (f - 1)/f

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Mass Transfer
__________ columns are used for liquid dispersion in a continuous gas phase.

Pulse
Bubble cap
Packed
Sieve plate

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Mass Transfer
For a binary mixture with low relative volatility,

Use molecular distillation
An azeotrope may be formed during distillation
Use steam distillation
Use high pressure distillation

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