Question

7. Explain the term - 'sublimation'. Is sublimation of naphthalene - a physical or a chemical
change. Give reasons.
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Answer 1

Explanation:

sublimation. When anything solid turns into a gas without first becoming liquid, that's sublimation. When the surface layer of snow or ice turns into fog or steam without melting, this is an example of sublimation.

sublimation of napthalene is a physicl change as the napthalene vapours can convert to solid napthlene on condensation.