Mass Transfer
Minimum reflux ratio in a distillation column results in

Optimum number of trays
Minimum reboiler size
Maximum condenser size
Minimum number of trays

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Mass Transfer
For absorbing a sparingly soluble gas in a liquid

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

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