Question

Give one important application of sublimation.

Answer 1

• While storing woolen clothes, naphthalene balls are added to protect them from moths and insects that can damage fibres of the woolen clothes
• This is possible because solid naphthalene balls undergo sublimation and release vapors with peculiar odour that repels these insects.
• Sublimation: Direct conversion of a solid substance into its vapor state or vice versa without changing into liquid state. Examples: Camphor, Naphthalene
• $\mathrm{Camphor}\left(\mathrm{s}\right)\underset{-\mathrm{Heat}}{\overset{+\mathrm{Heat}}{\rightleftarrows }}\mathrm{Camphor}\left(\mathrm{g}\right)$