Naphthalene balls disappear with time leaving any solid
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Answer: (a) Naphthalene ballsundergo sublimation due to which it converts directly into vapours and disappear into air without leaving any solid. (b) The particles of perfume diffuse rapidly into the air and its smell can be felt while sitting several metres away.
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it under goes process called Sublimation
(turning of solid to gas) so it disappears
(turning of solid to gas) so it disappears
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