Which of the following is the correct category for dry ice, ammonium chloride, naphthalene balls, and camphor?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. Sublimable substances.
The correct category for dry ice (solid CO₂), ammonium chloride, naphthalene balls, and camphor is sublimable substances. These compounds undergo sublimation, transitioning directly from a solid to a gas without passing through a liquid phase.
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Dry ice sublimates at room temperature, used for cooling.
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Ammonium chloride sublimes when heated, seen in chemistry experiments.
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Naphthalene balls (mothballs) slowly sublime, repelling insects.
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Camphor sublimes, used in medicinal and religious applications.
All exhibit this unique property, making sublimation their defining characteristic.