Mass Transfer
For a distillation column operating at minimum reflux, the

Concentration of liquid and vapour leaving a plate will be same
Number of plates required will be maximum
Reflux ratio will be maximum
None of these

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Mass Transfer
For absorbing a sparingly soluble gas in a liquid

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 decreased
Liquid side mass transfer co-efficient should be increased

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