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Which of the following processes describes the direct conversion of a solid into a gas without passing through the liquid state?
- a)Fusion
- b)Condensation
- c)Solidification
- d)Sublimation
Correct answer is option 'D'. Can you explain this answer?
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Which of the following processes describes the direct conversion of a ...
Understanding Sublimation
Sublimation is a fascinating process that involves the direct transition of a solid into a gas, bypassing the liquid phase entirely. Here’s a detailed breakdown of this process:
Definition of Sublimation
- Sublimation occurs when certain substances, such as dry ice (solid carbon dioxide) or iodine, transition from a solid state directly to a gaseous state when heated.
Characteristics of Sublimation
- No Liquid Phase: The key feature of sublimation is that there is no intermediate liquid form; the solid transforms directly into gas.
- Endothermic Process: Sublimation requires energy, often in the form of heat, which allows the molecules in the solid to gain enough energy to overcome intermolecular forces and escape into the air as gas.
Examples of Sublimation
- Dry Ice: Dry ice sublimes at room temperature, turning directly into carbon dioxide gas, which is commonly used in fog machines and refrigeration.
- Iodine Crystals: When heated, iodine crystals sublimate, producing a purple vapor without forming any liquid.
Importance of Sublimation
- Applications in Industry: Sublimation is used in freeze-drying food, which preserves its structure and nutrients while removing moisture.
- Scientific Observations: Sublimation is also observed in various natural processes and is essential in understanding phase changes in materials.
In summary, sublimation is the process defined in the question, making option 'D' the correct answer. It highlights the unique ability of certain solids to transition directly into gas, a fascinating aspect of physical chemistry.
Sublimation is a fascinating process that involves the direct transition of a solid into a gas, bypassing the liquid phase entirely. Here’s a detailed breakdown of this process:
Definition of Sublimation
- Sublimation occurs when certain substances, such as dry ice (solid carbon dioxide) or iodine, transition from a solid state directly to a gaseous state when heated.
Characteristics of Sublimation
- No Liquid Phase: The key feature of sublimation is that there is no intermediate liquid form; the solid transforms directly into gas.
- Endothermic Process: Sublimation requires energy, often in the form of heat, which allows the molecules in the solid to gain enough energy to overcome intermolecular forces and escape into the air as gas.
Examples of Sublimation
- Dry Ice: Dry ice sublimes at room temperature, turning directly into carbon dioxide gas, which is commonly used in fog machines and refrigeration.
- Iodine Crystals: When heated, iodine crystals sublimate, producing a purple vapor without forming any liquid.
Importance of Sublimation
- Applications in Industry: Sublimation is used in freeze-drying food, which preserves its structure and nutrients while removing moisture.
- Scientific Observations: Sublimation is also observed in various natural processes and is essential in understanding phase changes in materials.
In summary, sublimation is the process defined in the question, making option 'D' the correct answer. It highlights the unique ability of certain solids to transition directly into gas, a fascinating aspect of physical chemistry.
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Which of the following processes describes the direct conversion of a ...
The process where a solid changes directly into a gas without becoming a liquid first is called sublimation.
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Which of the following processes describes the direct conversion of a solid into a gas without passing through the liquid state?a)Fusionb)Condensationc)Solidificationd)SublimationCorrect answer is option 'D'. Can you explain this answer? for Class 9 2026 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Which of the following processes describes the direct conversion of a solid into a gas without passing through the liquid state?a)Fusionb)Condensationc)Solidificationd)SublimationCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 9 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following processes describes the direct conversion of a solid into a gas without passing through the liquid state?a)Fusionb)Condensationc)Solidificationd)SublimationCorrect answer is option 'D'. Can you explain this answer?.
Which of the following processes describes the direct conversion of a solid into a gas without passing through the liquid state?a)Fusionb)Condensationc)Solidificationd)SublimationCorrect answer is option 'D'. Can you explain this answer? for Class 9 2026 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Which of the following processes describes the direct conversion of a solid into a gas without passing through the liquid state?a)Fusionb)Condensationc)Solidificationd)SublimationCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 9 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following processes describes the direct conversion of a solid into a gas without passing through the liquid state?a)Fusionb)Condensationc)Solidificationd)SublimationCorrect answer is option 'D'. Can you explain this answer?.
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