General Principles and Processes of Isolation of Elements - Result Question 16
####16. Which of the following pairs of metals is purified by van Arkel method?
[2011]
(a) Ga and In
(b) $Zr$ and $Ti$
(c) $Ag$ and $Au$
(d) $Ni$ and $Fe$
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Solution:
- (b) $Zr$ and Ti are purified by van Arkel method.
$ \begin{aligned} & Zr(s)+2 I_2(g) \longrightarrow ZrI_4(g) \\ & ZrI_4(g) \xrightarrow[\text{ filament }]{\text{ On the hot }} Zr(s)+2 I_2(g) \end{aligned} $
