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Mass Transfer

Mass Transfer
The unit of volumetric diffusivity is

Cm/sec
Cm³/sec
Cm²/seC₂
Cm²/sec

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Mass Transfer
During sensible cooling process

Relative humidity decreases
Both B and C
Wet bulb temperature decreases
Relative humidity increases

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Mass Transfer
Desirable value of absorption factor in an absorber is

> 1
1
< 1
0.5

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Mass Transfer
Overall efficiency of the distillation column is

Same as the Murphree efficiency
Always more than the point efficiency
The ratio of number of actual plates to ideal plates
The ratio of number of ideal plates to actual plates

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Mass Transfer
When the __________ the relative humidity of air decreases, despite an increase in the absolute humidity.

Pressure rises
Temperature rises
Pressure falls
Temperature falls

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Mass Transfer
The boiling points of pure components of a binary system __________ with increase in total pressure of the system.

Decreases
Increases
May increase or decrease, depends on the system
Remains unchanged

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