Question -
Which of the following pair of metals is purified by van Arkel method?
Options:
A .  Ga & In
B .  Ag & Au
C .  Zr & Ti
D .  Ni & Fe
Answer: Option C : C van Arkel Method: The impure metal (Zr and Ti) are converted to a volatile compound, impurities being unaffected. Theformed pure volatile compound is decomposed to get the pure metal. Hence this is a method to obtain ultra pure metal by refining. Hf & Si can also be purified by van Arkel method.
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