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Mass Transfer

Mass Transfer
Mechanism of moisture removal in case of freeze drying of food stuff is by

Sublimation
Dehydration
Evaporation
Adsorption

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Mass Transfer
The velocity, concentration and temperature boundary, for the boundary layer development on a flat plate during connective mass transfer will be same, if

NPr = NLe
NSc = 1
NSc = NPr = NLe
NSc = NLe

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Mass Transfer
The film penetration model of mass transfer was enunciated by

Gilliland
Stefan
Toor and Marchello
Fick

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Mass Transfer
Which of the following quantities need not be fixed before starting the design of a co-current absorber?

None of the listed here
Flow rate of entering liquid
Heat gain or loss
Flow rate of gas

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Mass Transfer
Wetted wall tower experiment determines the

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

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Mass Transfer
If a₁ and a₂ are the relative volatilities when the pressure in the distillation column is 1 and 2 atm respectively. Pick out the correct statement.

None of these
a₁ = 2a₂
a₁ = a₂
a₁ = 0.5 a₂

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