Question

Which of the following pairs of metals is purified by Van Arkel method ?

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Answer 1

$ZrandTi$ is purified by the Van-Arkel method. This method is used to remove the oxygen and nitrogen completely present in the impure form of metals.
Reactions:
$Zr+2I_2\to \underset{\text{More Covalent}\text{Volatilises}}{Zr{I}_2}$
$Zr{I}_2\to \underset{\text{Pure Metal}}{Zr}+2I_2$