Distillation Techniques
Fractional distillation is most suitable for separating two miscible liquids when their boiling points differ by:
Select the correct option:
Solution
Less than 25 degC
Simple distillation is generally effective when boiling points differ widely, while fractional distillation is required for close boiling liquids. A fractionating column provides repeated vapour-liquid equilibration, improving separation when boiling point difference is small, typically below about 25 degC.
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About This Question
- Subject
- chemistry
- Chapter
- purification and characterisation of organic compounds
- Topic
- distillation techniques
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
Less than 25 degC
Simple distillation is generally effective when boiling points differ widely, while fractional distillation is required for close boiling liquids. A fractionating column provides repeated vapour-liquid equilibration, improving separation when boiling point difference is small, typically below about 25 degC.
This medium difficulty chemistry question is from the chapter purification and characterisation of organic compounds, covering the topic of distillation techniques. It appeared in the 2025 exam.
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