Zone-refining has been employed for preparing ultra-pure samples of:
A
Cu
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B
Zn
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C
Ge
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D
Ag
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Solution
The correct option is C Ge
Zone Refining or Fractional Crystallisation is employed to get metal of very high purity i,e. ultra pure samples of Ge Si, B, Ga, In. This method is based on the fact that impurities are more soluble than the pure metal in the melt.