Mass Transfer
Mass transfer co-efficient is defined as

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

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Mass Transfer
Solvent extraction is the terminology applied to the liquid-liquid extraction, which is preferred for the separation of the components of liquids, when

Viscosity of liquid components is very high
Extracting solvent is cheaply & abundantly available
One of the liquid components has very high affinity towards the solvent
One of the liquid components is heat sensitive

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Mass Transfer
In saturated gas, the

Partial pressure of vapour equals the vapour pressure of the liquid at room temperature
Vapour is in equilibrium with the liquid at the gas temperature
None of the listed here
Vapour is in equilibrium with the liquid at the room temperature

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