Question

Naphthalene balls disappear with time without leaving any solid. This is due to ...........

Answer 1

Answer:Naphthalene undergoes sublimation easily i.e., the change of state of naphthalene from solid to gas without the intervention of the liquid state. Thus, naphthalene balls keep on forming naphthalene vapours which disappear into the air with time without leaving any solid.

EXPLANATION: SIMPY THEY ARE SUBLIMANTERY SUBSTANCES AND DUE TO SUBLIMATION THEY BECAME VAPOUR

Answer 2

Answer: SUBLIMATION.

Explanation:

Sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state.

                                                        OR

The sublimation occurs in naphthalene. The process of conversion of solid state of matter in to gaseous state of matter without reaching the liquid state is called sublimation. Naphthalene disappears into vapors hence Naphthalene balls disappear with time without leaving any solid.

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