Mass Transfer
If G = insoluble gas in gas stream and L = non-volatile solvent in liquid stream, then the slope of the operating line for the absorber is

None of these
G/L
Always < 1
L/G

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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

Liquid phase obeys Dalton's law and vapor phase obeys Raoult's law
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

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Mass Transfer
Steam distillation is not recommended to be used, if the

Liquids decompose, if distilled directly at atmospheric pressure
Azeotropic mixture is to be separated and the final product is miscible with water
Material to be distilled is thermally unstable or has the tendency to react with other components associated with it, at the boiling temperature
Material can not be distilled by indirect heating even under low pressure, because of the high boiling temperature

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