As the reflux ratio decreases, the_________________?
Correct answer: D. Number of plates increases
- A. Separation becomes more efficient
- B. None of these
- C. Column diameter increases
- D. Number of plates increases
Explanation
Lowering the reflux ratio reduces the liquid returned to the column and weakens separation per stage, so more theoretical plates are needed for the same separation. The column diameter is mainly related to vapour traffic, not directly to this stage requirement.
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