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Mass Transfer

Mass Transfer
A good solvent used for absorption should not have very high

Freezing point
All of these
Viscosity
Vapor pressure

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Mass Transfer
The relative volatility of a binary mixture at constant temperature __________ the total pressure.

Increases with increase in
Decreases with increase in
None of these
Is independent of

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Mass Transfer
What is the degree of freedom of an absorption process in which only one component is transferred between phases?

3
2
1
4

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Mass Transfer
Though, theoretically the adsorption & desorption isotherms is expected to coincide but sometimes at least a part of the isotherms does not coincide and this phenomenon is known as adsorption hysterisis. In such cases, the desorption equilibrium pressure is __________ that obtained for adsorption.

Lower than
Higher than
Same as
Either same or higher than

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Mass Transfer
Molecular diffusivity of a liquid

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

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Mass Transfer
The amount of steam required per unit quantity of distillate in case of steam distillation will be reduced by

Lowering the total pressure
Both A & B
Raising the temperature
Neither A nor B

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