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Mass Transfer

Mass Transfer
Dorr thickener is an equipment used for

Clarification
Classification
Leaching
Sedimentation

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Mass Transfer
The unit of volumetric diffusivity is

Cm²/sec
Cm²/seC₂
Cm/sec
Cm³/sec

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Mass Transfer
When a multistage tray tower uses a minimum reflux ratio, it implies

Minimum trays and maximum reboiler heat load
Infinite trays and maximum reboiler heat load
Infinite trays and minimum reboiler heat load
Minimum trays and minimum reboiler heat load

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Mass Transfer
In case of an unsaturated mixture of gas and vapor, the percentage saturation is __________ its relative saturation.

Lower than
Higher than
Equal to
Either A or B, depends on the mixture composition

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Mass Transfer
Mass transfer co-efficient is defined as

Co-efficient = Flux/concentration difference
Flux = Co-efficient/concentration difference
None of the listed here
Flux=concentration difference/co-effi-cient

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Mass Transfer
Positive deviation from Raoult's law means a mixture whose total pressure is

Less than that computed for ideality
Greater than that computed for ideality
Less than the sum of the vapour pressure of the components
None of these

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