Question

Which process of purification is represented by the following scheme?

$\underset{impure}{Ti}+2I_2\stackrel{{250}^{o}C}{\to }Ti{I}_4\stackrel{{1400}^{o}C}{\to }\underset{pure}{Ti}+2I_2$

• A. Cupellation
• B. Electrolytic refining
• C. Zone refining
• D. Van-Arkel process

Answer 1

The correct option is D Van-Arkel process

Van-Arkel method is used for refining metals like $Ti,Zr$, etc. The metal is converted into its volatile stable compound such as $Ti{I}_4$, leaving behind impurities. The stable volatile compound thus formed is decomposed to get the pure metal.

$\underset{impure}{Ti}+2I_2\stackrel{{250}^{o}C}{\to }Ti{I}_4\stackrel{{1400}^{o}C}{\to }\underset{pure}{Ti}+2I_2$

So, the correct option is $D$