Question

Why does naphthalene balls dissapear with time without leaving any solid

Answer 1

Answer:

Naphthalene balls disappear because of the process of Sublimation at room temperature (a process by with solid directly changes to gas without going through the intermediate state of matter, liquid is called as Sublimation). So as it goes through Sublimation, the naphthalene balls is converted to gas from solid.

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Answer 2

Answer:

Coz it undergoes sublimation.