Question

The process of the gradual disappearance of a naphthalene ball is known as ______.

विकल्प

• evaporation

• solidification

• sublimation

• melting

Answer 1

The process of the gradual disappearance of a naphthalene ball is known as sublimation.

Explanation:

Sublimation is a phase change where a solid turns directly into a gas without melting into a liquid first. Naphthalene balls slowly transition directly into vapour over time when exposed to air.