Question

Which of the following solids are known to undergo sublimation?
i. ${CO}_2$
ii. $I_2$
iii. Naphthalene

• A. i only
• B. ii only
• C. i and ii only
• D. ii and iii only
• E. i, ii and iii

Answer 1

The correct option is E i, ii and iii

Following solids are known to undergo sublimation :

i. $C{O}_2$
ii. $I_2$
iii. Naphthalene

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

Sublimation is an endothermic phase transition that occurs at temperatures and pressures below a substance's triple point in its phase diagram.

The reverse process of sublimation is desublimation or deposition, in which a substance passes directly from a gas to a solid phase.

Sublimation has also been used as a generic term to describe phase changes between solid and gas that avoid the liquid state without specifying the direction of the transition.

Hence the correct option is E.