Question

Assertion (A): In sublimation, a substance directly change from solid to vapours without

passing through liquid state and vice-versa.

Reason (R): Distillation involves two processes i.e. vapourisation & condensation.​

Answer 1

Answer:

assertion A is correct but B is not the reason

Answer 2

The assertion and reason both are TRUE.

• Sublimation is the direct conversion of a solid substance into its gaseous state without passing through the liquid phase.
• The vice-versa is also called sublimation.
• Sublimation is a phase transition process.
• The distillation is a purification process.
• In distillation, the liquid heats till boiling. Then the vapors are condensed and collected to get the pure fluid (liquid).
• Distillation consists of vaporization and condensation.
• Hence, both statements are correct, but the reason is not the correct explanation of the assertion.