WBCS.LIVE practice question

Which chemical process involves the direct conversion of a solid substance into a gas without passing through the liquid state?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. Evaporation
  2. Sublimation
  3. Condensation
  4. Distillation

Correct answer and explanation

Correct answer: Sublimation

Explanation: ✅ Correct Answer: B) Sublimation 📚 Explanation: Sublimation is a unique phase transition that occurs in certain substances like naphthalene, camphor, and dry ice (solid CO₂). Under specific pressure and temperature conditions, these solids gain enough energy to bypass the liquid phase entirely. This property is frequently used in air fresheners and for purifying chemical mixtures in laboratories.