Question

Which of the following is sublimate?

• A. Iodine
• B. Camphor
• C. Naphthalene
• D. Any of these

Answer 1

The correct option is D

Any of these

1. Sublimation is the transformation of a substance from its solid state to its gaseous state.
2. At ordinary temperature and pressure, all compounds that sublimate have a significant vapour pressure.
   These chemicals absorb enough energy from their surroundings to break through intermolecular interactions in the solid state and enter the vapour phase. The enthalpy of sublimation is the amount of energy necessary to transition directly from the solid to the vapour phase.
3. The enthalpy of fusion and the enthalpy of vaporisation can be combined to get this figure.
   Sublimation is an endothermic process because it requires energy from its surroundings to break the intermolecular hydrogen bonds (absorbs heat from the surroundings).
4. Keep in mind that sublimation is a purely physical process, and the molecular composition of the substances does not change.
5. Camphor sublimation differs from camphor combustion when it is utilised as a fuel.
6. When we burn camphor or even paraffin wax candles, they undergo a chemical shift as a result of the oxygen reaction.
7. Camphor sublimates when exposed to the air, whereas paraffin wax does not.
8. As a result, camphor is classified as a sublimating substance.

Hence, option (D) is correct.