Crystallisation
For efficient recrystallisation of an organic solid, the most suitable solvent should:
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About This Question
- Subject
- chemistry
- Chapter
- purification and characterisation of organic compounds
- Topic
- crystallisation
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Dissolve the solute well at high temperature but sparingly at low temperature
In recrystallisation, the impure solid is dissolved in minimum hot solvent and then cooled. Good crystal recovery needs high solubility of solute in hot solvent and low solubility in cold solvent. This allows pure crystals to separate on cooling while many impurities remain in mother liquor.
This easy difficulty chemistry question is from the chapter purification and characterisation of organic compounds, covering the topic of crystallisation. It appeared in the 2025 exam.
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