Mass Transfer
To increase the absorption factor, (where, G = gas flow rate, S = solvent flow rate)

Decrease both 'G' and 'S'
Increase 'S' and decrease 'G'
Increase 'G' and decrease 'S'
Increase both 'G' and 'S'

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Mass Transfer
For water-ethanol system, the minimum reflux ratio

Is the optimum reflux ratio
Is computed from the slope of the upper operating line that is tangent to the equilibrium curve
Is computed from the intercept of the operating line
Cannot be computed

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Mass Transfer
Plate efficiency

Increases due to weeping and dumping of liquid
Is a function of the mass transfer between liquid and vapour
Increases due to liquid entrainment
Increases due to foaming

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