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

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

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Mass Transfer
Which of the following psychrometric processes is followed by water vapour laden unsaturated air, when it is passed through solid or liquid adsorbent?

None of these
Dehumidification with dry bulb temperature remaining constant
Cooling and dehumidification
Heating and dehumidification at almost constant wet bulb temperature

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