Question

Van Arkel method is used for

• A. Concentration
• B. Leaching
• C. Roasting
• D. Refining

Answer 1

The correct option is D

Refining

Van Arkel Method: The impure metal is converted to volatile compound, impurities being unaffected. Thus formed pure volatile compound is decomposed to get the pure metal. Hence this is a method to obtain ultra pure metal by refining.

For example:

$Zr\left(Impure\right)$ $+2I_2$ $\to$ $Zr{I}_4$ $\left(Gas\right)$

$Zr{I}_4$ $\left(Gas\right)$ $\to$ $Zr\left(Pure\right)+2I_2$