Naphthalene balls disappear with time without leaving any solid.

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Solution

Naphthalene balls disappear with time without leaving any solid because,
Naphthalene balls undergo sublimation.
Sublimation is a process in which the solid state is directly converted into gaseous state without undergoing liquid state.
Thus the naphthalene balls keep forming naphthalene vapours that disappear in the air without leaving any solid behind.

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(a) Naphthalene balls disappear with time without leaving any solid.

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Why do naphthalene balls disappear with time without leaving any solid behind?

Naphthalene balls disappear with time without leaving any solid residue. Why? [1 MARK]

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