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General Principles and Processes of Isolation of Elements — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryGeneral Principles and Processes of Isolation of Elements1 Mark
MCQ
Zone$-$refining has been employed for preparing ultra-pure samples of:
  • A
    $Cu$
  • B
    $Zn$
  • ✓
    $Ge$
  • D
    $Ag$
✓

Answer

Correct option: C.
$Ge$
Zone Refining or Fractional Crystallisation is employed to get metal of very high purity i, e. ultra pure samples of $\text{Ge Si, B, Ga, In}.$ This method is based on the fact that impurities are more soluble than the pure metal in the melt.

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