Exams › JEE Main › Chemistry

Which purification method is illustrated by the sequence Ti + 2I2 → TiI4 → Ti + 2I2?

1. Cupellation
2. Van Arkel process
3. Poling
4. Zone refining

Correct answer: Van Arkel process

Solution

Forming a volatile metal iodide (Ti + 2I2 -> TiI4) and then decomposing it on a hot filament back to pure metal (TiI4 -> Ti + 2I2) is the Van Arkel process, used to obtain ultra-pure Ti and Zr.

Related JEE Main Chemistry questions

• In the sequence used during extraction and purification of a metal, a metal sulphide is first converted to a metal oxide, then to an impure metal, and finally to a pure metal: Metal sulphide —x→ Metal oxide —y→ Impure metal —z→ Pure metal. What are x, y and z respectively?
• In Bayer’s process, which substance is employed as the reagent?
• Thomas slag refers to which of the following substances?
• Which of the following fluxes is employed to eliminate acidic impurities during a metallurgical operation?
• Which material is used to provide a basic lining to a furnace?
• Electromagnetic separation is employed in the beneficiation of which ore?

⚔️ Practice JEE Main Chemistry free + battle 1v1 →