The zone refining method is based on which principle?

  • A
    Higher conductivity of pure metal than impurities
  • B
    Higher melting point of impurities than pure metal
  • C
    Higher noble character of pure metal than impurities
  • D
    Greater solubility of impurities in the molten state than in the solid state

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Zone refining process is used for which of the following?

Which refining process is generally used in the purification of low melting metals?

Write the chemical equations for the $Van$ $Arkel$ method used for the refining of $Zr$ and $Ti$.

Formation of $Ni(CO)_4$ and its subsequent decomposition into $Ni$ and $CO$ (recycled) forms the basis of the Mond process.
$Ni + 4CO$ $\xrightarrow{T_1} Ni(CO)_4$ $\xrightarrow{T_2} Ni + 4CO$
$T_1$ and $T_2$ are:

The Orford process is used in the extraction of

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