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Mass Transfer

Mass Transfer
Rate of leaching increases with increasing

Viscosity of solvent
Temperature
Pressure
Size of the solid

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Mass Transfer
Flooding in a column results due to

High pressure drop
Low pressure drop
Low velocity of the liquid
High temperature

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Mass Transfer
During bottling of cold drinks (e.g. Pepsi), the main resistance to mass transfer for the absorption of carbon dioxide in water lies in the

Liquid film
None of these
Liquid-gas interface
Gas film

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

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

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Mass Transfer
What is the reflux ratio at total reflux?

Infinity
Unity
Zero
Data insufficient

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Mass Transfer
Batch tray dryers suffers from the disadvantage of

High labour cost & low heat economy
High maintenance cost
All of the listed here
Non-uniform & low production rate

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