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Mass Transfer

Mass Transfer
Mass transfer co-efficient (K) and diffusivity (D) are related according to film theory as

K ∝ D
K ∝ D2
K ∝ D1.5
K ∝ √D

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Mass Transfer
In the constant rate period of the rate of drying curve for batch drying,

None of these
Rate of drying decreases abruptly
Surface evaporation of unbound moisture occurs
Cracks develop on the surface of the solid

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Mass Transfer
Alcohol is dehydrated using __________ distillation.

Steam
Extractive
Molecular
Azeotropic

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Mass Transfer
Stefan's law describes the mass transfer by

Both A & B
Neither A nor B
Diffusion
Bulk flow

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Mass Transfer
Mass transfer co-efficient varies as DAB0.5, according to the __________ theory.

Surface renewal
None of these
Film
Penetration

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Mass Transfer
Total reflux in a distillation operation requires minimum

Reboiler load
Condenser load
All of these
Number of plates

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