Mass Transfer
Heat sensitive materials with very high latent heat of vaporisation may be economically separated using

Absorption
Liquid extraction
Evaporation
Distillation

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Mass Transfer
The wetted wall tower is used to determine

Individual mass transfer co-efficient (M.T.C.) in gaseous system
M.T.C. of liquid in liquid-gas system
The overall M.T.C. of the system
M.T.C. of individual components in a liquid-liquid system

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Mass Transfer
Relative volatility varies with the concentration of component for an ideal solution. The relative volatity of a binary mixture may be defined as the ratio of vapor pressure of component 'A' to that of component 'B', when

Only liquid phase obeys Dalton's law
Vapor phase obeys Dalton's law and liquid phase obeys Raoult's law
Only vapor phase follows Raoult's law
Liquid phase obeys Dalton's law and vapor phase obeys Raoult's law

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Mass Transfer
For absorbing a sparingly soluble gas in a liquid

Liquid side mass transfer co-efficient should be decreased
Mass transfer co-efficient must be kept constant
Gas side mass transfer co-efficient should be increased
Liquid side mass transfer co-efficient should be increased

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