Question

The process responsible for the given change:
Naphthalene balls disappear over time without leaving any solid residue behind.

a) Evaporation
b) Melting
c) Boiling
d) Sublimation
[1 Mark]

Answer 1

Option (d) is correct. i.e., Sublimation
[1 Mark]

• The process of conversion of a solid to gaseous state without passing through the liquid sate is known as sublimation.
  
• Naphthalene balls when left undisturbed over time disappear into the air without leaving any solid residue behind.
• Hence, sublimation is responsible for the disappearance of naphthalene balls.