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Mass Transfer

Mass Transfer
Rose oil is extracted from rose leaves using __________ distillation.

Steam
High pressure
Extractive
Low pressure

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Mass Transfer
Unsaturated air (with dry bulb and wet bulb temperatures being 45°C and 25°C respectively) is passed through a water spray chamber maintained at 23°C. The air will be cooled and

Humidified with wet bulb temperature decreasing
Humidified at constant wet bulb temperature
Dehumidified
None of these

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Mass Transfer
Flash distillation is suitable for separating the constituents of a binary system, which

Form minimum boiling azeotrope
Form constant boiling azeotrope
Have very wide boiling points
Have very close boiling points

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Mass Transfer
Deairation (removal of O₂) of water is done by

Absorption
Rectification
Adsorption
Ion-exchange

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Mass Transfer
Which of the following parameters remains constant during chemical dehumidifica-tion?

Partial pressure of vapour
None of these
Wet bulb temperature
Dry bulb temperature

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Mass Transfer
For a distillation column operating at minimum reflux, the

Reflux ratio will be maximum
Concentration of liquid and vapour leaving a plate will be same
Number of plates required will be maximum
None of these

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