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प्रश्न
Describe the process of sublimation with examples.
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उत्तर
Sublimation is a form of phase transition or shift in a state of matter. The process of change of solid directly into vapours on heating is sublimation without ever going through a liquid phase. A common example of sublimation is the dry ice, heavy CO2.
Examples of Sublimation:
- Camphor: Camphor sublimates when heated, producing a fragrant vapor.
- Dry Ice (Solid Carbon Dioxide): At room temperature and normal pressure, dry ice sublimates directly into carbon dioxide gas.
- Iodine Crystals: When heated, iodine changes from solid purple crystals to a purple gas.
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संबंधित प्रश्न
.............. is a process that involves direct conversion of a solid into its vapour on heating.
What do you mean by sublimation? Explain with an example.
Why does the size of naphthalene balls decrease when left open?
Describe an experiment to demonstrate the process of sublimation.
Define sublimation.
‘Osmosis is a special kind of diffusion’. Comment.
Why does only iodine appear as violet vapours on heating?
How do weak intermolecular forces help sublimation?
Why is sublimation useful for separating iodine and sand?
“On heating, some solid substances change from solid to vapour state without passing through liquid state.” The technique used for the purification of such solid substances based on the above principle is known as:
