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Mass Transfer

Mass Transfer
In liquid-liquid extraction, the number of phases at plait point is

4
2
1
3

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Mass Transfer
The feed to fractionating column is changed from saturated vapour to saturated liquid. If the separation and reflux ratio remains unchanged, the number of ideal stages will

Decrease
Remains same
Depend on saturated boiling point; may increase or decrease
Increase

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Mass Transfer
1 kg of a saturated aqueous solution of a highly soluble component A at 60°C is cooled to 25°C. The solubility limits of A are (0.6 kgA/kg water) at 60°C and (0.2 kgA/kg water) at 25°C. The amount in kg of the crystals formed is

0.175
0.2
0.25
0.4

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Mass Transfer
Percentage saturation is __________ the relative saturation.

Always greater than
None of these
Not related to
Always smaller than

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Mass Transfer
Molecular diffusivity of a liquid

Increases with temperature
Decreases with temperature
Is independent of temperature
May increase or decrease with temperature

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Mass Transfer
Separation of a mixture of two gases by absorption in the liquid solvent depends upon the difference in their

Density
Viscosity
Solubility
Relative volatility

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