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Mass Transfer

Mass Transfer
The value of Lewis number (Le = Sc/Pr) for air-water vapour system is around

0.24
3.97
1
600

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

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

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Mass Transfer
Milk is dried usually in a __________ dryer.

Spray
Freeze
Rotary
Tray

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Mass Transfer
Wetted wall tower experiment determines the

None of these
Volumetric co-efficient
Mass transfer co-efficient
Molal diffusivity

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Mass Transfer
Molality is defined as the number of gm moles of solute per __________ of solvent.

m³
Gm
Kg
Litre

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Mass Transfer
Heat sensitive materials with very high latent heat of vaporisation may be economically separated using

Absorption
Distillation
Liquid extraction
Evaporation

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