Question

Which of the following element is purified by vapour phase refining?

• A. $Fe$
• B. $Zr$
• C. $Cu$
• D. $Au$

Answer 1

Answer: (B)

$Zr$

$Zr$ is purified by vapour phase refining. Van Arkel method is used for refining $Zr,Ti$. Impure $Zr$ is heated with iodine to form volatile $Zr{I}_4$ which is then decomposed on a tungsten filament at 1800 K to obtain pure $Zr$. Monds process is used for $Ni$.