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People normally put some Naphthalene balls in the box in which they keep clothes and winter blankets. After some weeks they find that there is no Naphthalene ball left in the box. Why does the Naphthalene ball disappear with time, without leaving any residue?
- a)Condensation
- b)Sublimation
- c)Evaporation
- d)Diffusion
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
People normally put some Naphthalene balls in the box in which they k...
- Sublimation is the transition from the solid phase to the gas phase without passing through an intermediate liquid phase.
- This endothermic phase transition occurs at temperatures and pressures below the triple point. The term "sublimation" only applies to physical changes of state and not to the transformation of a solid into a gas during a chemical reaction.
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People normally put some Naphthalene balls in the box in which they k...
Explanation:
Naphthalene balls, also known as mothballs, are commonly used to protect clothes and blankets from damage by moths and other insects. However, over time, it is observed that these naphthalene balls disappear from the box without leaving any residue. The reason behind this phenomenon is sublimation.
Sublimation:
Sublimation is the process in which a solid directly changes into a gas without passing through the liquid state. In the case of naphthalene balls, they undergo sublimation due to their chemical properties.
Process of Sublimation:
1. Naphthalene balls are made up of solid naphthalene molecules.
2. When the box is closed and the environment inside the box is relatively warm, the temperature increases.
3. As the temperature increases, the naphthalene molecules gain enough energy to break the intermolecular forces holding them together.
4. The solid naphthalene molecules then transform into gaseous naphthalene molecules directly, without becoming a liquid.
5. These gaseous molecules escape from the box, resulting in the disappearance of the naphthalene balls over time.
Characteristics of Sublimation:
1. Sublimation is a physical process that occurs when a substance has a high vapor pressure at its melting point.
2. It only occurs under specific conditions of temperature and pressure.
3. Substances that undergo sublimation have weak intermolecular forces.
4. The process is typically faster at higher temperatures.
Advantages of Sublimation for Naphthalene Balls:
1. Disappearance without residue: Sublimation allows the naphthalene balls to disappear without leaving any residue in the box, making it a clean and convenient method.
2. Efficient protection: The sublimation of naphthalene molecules creates a protective vapor that repels insects and moths, effectively preventing damage to clothes and blankets.
3. Long-lasting effect: Since sublimation is a gradual process, the protection provided by naphthalene balls lasts for an extended period.
In conclusion, the disappearance of naphthalene balls from the box without leaving any residue is due to the process of sublimation. This process allows the solid naphthalene molecules to directly transform into a gas, which then escapes from the box. Sublimation is an efficient and long-lasting method of protecting clothes and blankets from insects and moths.
Naphthalene balls, also known as mothballs, are commonly used to protect clothes and blankets from damage by moths and other insects. However, over time, it is observed that these naphthalene balls disappear from the box without leaving any residue. The reason behind this phenomenon is sublimation.
Sublimation:
Sublimation is the process in which a solid directly changes into a gas without passing through the liquid state. In the case of naphthalene balls, they undergo sublimation due to their chemical properties.
Process of Sublimation:
1. Naphthalene balls are made up of solid naphthalene molecules.
2. When the box is closed and the environment inside the box is relatively warm, the temperature increases.
3. As the temperature increases, the naphthalene molecules gain enough energy to break the intermolecular forces holding them together.
4. The solid naphthalene molecules then transform into gaseous naphthalene molecules directly, without becoming a liquid.
5. These gaseous molecules escape from the box, resulting in the disappearance of the naphthalene balls over time.
Characteristics of Sublimation:
1. Sublimation is a physical process that occurs when a substance has a high vapor pressure at its melting point.
2. It only occurs under specific conditions of temperature and pressure.
3. Substances that undergo sublimation have weak intermolecular forces.
4. The process is typically faster at higher temperatures.
Advantages of Sublimation for Naphthalene Balls:
1. Disappearance without residue: Sublimation allows the naphthalene balls to disappear without leaving any residue in the box, making it a clean and convenient method.
2. Efficient protection: The sublimation of naphthalene molecules creates a protective vapor that repels insects and moths, effectively preventing damage to clothes and blankets.
3. Long-lasting effect: Since sublimation is a gradual process, the protection provided by naphthalene balls lasts for an extended period.
In conclusion, the disappearance of naphthalene balls from the box without leaving any residue is due to the process of sublimation. This process allows the solid naphthalene molecules to directly transform into a gas, which then escapes from the box. Sublimation is an efficient and long-lasting method of protecting clothes and blankets from insects and moths.
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People normally put some Naphthalene balls in the box in which they keep clothes and winter blankets. After some weeks they find that there is no Naphthalene ball left in the box. Why does the Naphthalene ball disappear with time, without leaving any residue?a) Condensationb) Sublimationc) Evaporationd) DiffusionCorrect answer is option 'B'. Can you explain this answer?
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People normally put some Naphthalene balls in the box in which they keep clothes and winter blankets. After some weeks they find that there is no Naphthalene ball left in the box. Why does the Naphthalene ball disappear with time, without leaving any residue?a) Condensationb) Sublimationc) Evaporationd) DiffusionCorrect answer is option 'B'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about People normally put some Naphthalene balls in the box in which they keep clothes and winter blankets. After some weeks they find that there is no Naphthalene ball left in the box. Why does the Naphthalene ball disappear with time, without leaving any residue?a) Condensationb) Sublimationc) Evaporationd) DiffusionCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for People normally put some Naphthalene balls in the box in which they keep clothes and winter blankets. After some weeks they find that there is no Naphthalene ball left in the box. Why does the Naphthalene ball disappear with time, without leaving any residue?a) Condensationb) Sublimationc) Evaporationd) DiffusionCorrect answer is option 'B'. Can you explain this answer?.
People normally put some Naphthalene balls in the box in which they keep clothes and winter blankets. After some weeks they find that there is no Naphthalene ball left in the box. Why does the Naphthalene ball disappear with time, without leaving any residue?a) Condensationb) Sublimationc) Evaporationd) DiffusionCorrect answer is option 'B'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about People normally put some Naphthalene balls in the box in which they keep clothes and winter blankets. After some weeks they find that there is no Naphthalene ball left in the box. Why does the Naphthalene ball disappear with time, without leaving any residue?a) Condensationb) Sublimationc) Evaporationd) DiffusionCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for People normally put some Naphthalene balls in the box in which they keep clothes and winter blankets. After some weeks they find that there is no Naphthalene ball left in the box. Why does the Naphthalene ball disappear with time, without leaving any residue?a) Condensationb) Sublimationc) Evaporationd) DiffusionCorrect answer is option 'B'. Can you explain this answer?.
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