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Mass Transfer

Mass Transfer
Liquid diffusivity is of the order of __________ cm² /second.

10-5 to 10-6
0.1
> 1
0.01

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

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

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Mass Transfer
Rotary dryers cannot handle __________ materials.

Grannular
Dry
Sticky
Free flowing

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Mass Transfer
Relative volatility does not change appreciably with the change in

Vapour pressure of either component
Total pressure
Temperature
None of these

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Mass Transfer
Tea percolation employs

Leaching
None of these
Liquid-liquid extraction
Absorption

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Mass Transfer
With increase in temperature, the rate of extraction in leaching (solid-liquid extraction system)

Decreases
Remains unaffected
Increases Linearly
Increases

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