Sublimation
Sublimation can be used to purify:
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About This Question
- Subject
- chemistry
- Chapter
- purification and characterisation of organic compounds
- Topic
- sublimation
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Solids that vaporize without melting
Sublimation is a physical process where a substance changes directly from a solid to a gaseous state without passing through the liquid phase upon heating.
- Application: Useful for purifying solids that possess a high vapor pressure below their melting point.
- Examples: Naphthalene, Anthracene, Benzoic acid, Camphor, and Iodine.
- Non-sublimable solid impurities are left behind in the heating vessel, while the sublimed vapors are condensed back to pure solid on a cold surface.
This easy difficulty chemistry question is from the chapter purification and characterisation of organic compounds, covering the topic of sublimation. It appeared in the 2025 exam.
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