For a binary mixture with low relative volatility, continuous rectification to get pure products will require_____________________?
Correct answer: B. High reflux ratio
- A. Low reflux ratio
- B. High reflux ratio
- C. Small cross-section column
- D. Less number of trays
Explanation
Low relative volatility makes separation difficult because the vapour composition differs only slightly from the liquid composition. A high reflux ratio provides more repeated vapor-liquid contact and is therefore required for high-purity products.
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