For a distillation column operating at minimum reflux, the_______________________?
Correct answer: C. Number of plates required will be maximum
- A. Concentration of liquid and vapour leaving a plate will be same
- B. Reflux ratio will be maximum
- C. Number of plates required will be maximum
- D. None of these
Explanation
At minimum reflux, the operating and equilibrium lines pinch, so an infinite number of ideal stages would be required for the specified separation. Thus, the required number of plates is maximum in the limiting sense.
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