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Question

Give reason for the following observation :
Naphthalene balls disappear with time without leaving any solid


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Solution

  • Sublimation is the process in which a solid directly changes to a gas without passing through the liquid state.
  • A substance is said to be sublime if it passes from the solid state directly into the gaseous state without changing into a liquid.
  • Substances such as ammonium chloride, camphor, and naphthalene undergo sublimation.
  • Naphthalene balls are volatile substances that sublime, i.e., they change from solid to the gaseous state without coming into a liquid state.

Hence, Naphthalene balls disappear with time without leaving any solid residue.


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