Mass Transfer
Flash distillation is

Most useful for handling binary systems
Same as simple distillation
Used for multicomponent systems like crude refining
Same as differential distillation

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Mass Transfer
For absorbing a sparingly soluble gas in a liquid

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

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