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Mass Transfer

Mass Transfer
Cox chart is useful in the design of

Evaporator
Crystalliser
Dryer
Distillation column

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Mass Transfer
Binary distillation involves the mass transfer by __________ at the gas-liquid interface.

A counter diffusion at an almost equal molar rate
Unidirectional diffusion from gas to liquid phase
Either A or B
Unidirectional diffusion from liquid to gas phase

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Mass Transfer
The Schmidt number which is defined as, μ/ρ D, is the ratio of the

Thermal diffusivity to the mass diffusivity
Momentum diffusivity to the mass dif-fusivity
Momentum diffusivity to the thermal diffusivity
None of these

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Mass Transfer
During the constant rate period of drying of a solid,

Increasing the air temperature decreases the drying rate
None of these
Surface evaporation of unbound moisture occurs
Increased air humidity decreases the rate of drying

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Mass Transfer
For the flow of gases through a capillary, with increase in temperature, the permeability __________ as per Knudsen law.

Decreases
Remains same
Either A or B; depends on the gas
Increases

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Mass Transfer
Rate of leaching increases with increasing

Temperature
Pressure
Size of the solid
Viscosity of solvent

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MORE MCQ ON Mass Transfer

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