Question

Impure Metal $+I_2\to$ Metal Iodide vapour $\stackrel{Heat}{\to }$ Pure metal $+I_2$
The above method of purification is :

• A. Van-Arkel process for Zr, Ti
• B. Distillation for Zn, Cd, Hg
• C. Electro refining for Ag, Au
• D. Zone refining of Ge, Ga, Si

Answer 1

The correct option is A Van-Arkel process for Zr, Ti

Van-Arkel method is used for the purification of zirconium or titanium. The metal iodide formed in the intermediate step is volatilized and the pure metal is deposited on the tungsten filament.