Sublimation
Sublimation can be used to purify:
Select the correct option:
Solution
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.
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More sublimation Practice Questions
A mixture contains camphor along with a non-volatile sand impurity, and the chemist needs to recover...
A mixture contains camphor along with a non-volatile sand impurity, and the chemist needs to recover...
Which substance can be effectively purified by sublimation under ordinary laboratory conditions?
Which substance can be effectively purified by sublimation under ordinary laboratory conditions?
Which mixture can be separated by sublimation?
Which mixture can be separated by sublimation?
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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