Which halogen can be purified by sublimation ? (2024)

FAQs

Which halogen is purified by sublimation? ›

Iodine is solid at room temperature. In the laboratory, solid iodine is kept in sublimation apparatus and is heated under vacuum. Because of the reduced pressure, the non-volatile impurities remain behind.

For example, naphthalene, benzoic acid, camphor, iodine, etc.

Only Iodine is a halogen that sublimates, or converts directly into a gaseous form without melting. At normal temperature, iodine is solid. Solid iodine is warmed under vacuum in a sublimation equipment in the laboratory.

So, iodine can be purified by sublimation.

true, iodine can be purified by sublimation.

Thus, iodine can be purified by sublimation.

This process is sublimation. We use this process for the separation of sublimable volatile compounds from non-sublimable impurities. We use this for the purposes of purification of camphor, naphthalene, anthracene, benzoic acid, Iodine and salicylic acid etc containing non-volatile impurities.

Liquid bromine has a high vapor pressure, and the reddish vapor is readily visible in Figure 18.11. 1. Iodine crystals have a noticeable vapor pressure. When gently heated, these crystals sublime and form a beautiful deep violet vapor.

The halogen elements are fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and tennessine (Ts).

Which of the following is purified by sublimation if the impurities? ›

Nickel is purified by this method. Note: For sublimation, it is necessary to know which elements are volatile in nature and which are not.

The best example of sublimation is dry ice which is a frozen form of carbon dioxide. When dry ice gets exposed to air, dry ice directly changes its phase from solid-state to gaseous state which is visible as fog.

Sublimation is a process in which a solid substance directly converts into its gaseous form without passing through the liquid phase. Few of the substances which can undergo sublimation are iodine, ammonium chloride, camphor, naphthalene and carbon dioxide.

So from a mixture, containing ammonium chloride and common salt, ammonium chloride can be easily separated by the process of sublimation. On heating ammonium chloride converts into vapour leaving behind the non-volatile component, Salt. On cooling the vapour of ammonium chloride changes into solid.

Chlorine is the best known of the halogen elements. The free element is widely used as a water-purification agent, and it is employed in a number of chemical processes. Table salt, sodium chloride, of course, is one of the most familiar chemical compounds.