Which of the following pair of metals is purified by van Arkel method?

Ga & In

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Ag & Au

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Zr & Ti

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Ni & Fe

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Solution

The correct option is C
Zr & Ti

van Arkel Method: The impure metal (Zr and Ti) are converted to a volatile compound, impurities being unaffected. The formed 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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