Which method of purification is represented by the equation
$Ti + 2I_2$ (Impure) $\xrightarrow{500 \ K} TiI_4$ $\xrightarrow{1675 \ K} Ti + 2I_2$ (Pure)

The process of zone refining is used in the purification of

Which of the following statements are correct related to metallurgy?
$A$. In electrolytic refining of copper,pure $Cu$ is used as anode.
$B$. Zone refining is based on the principle that impurities are more soluble in the melt than in the solid state of the metal.
$C$. $TiI_4$ upon heating will give pure $Ti$.
$D$. Very pure $Zr$ may be obtained by galvanisation.
$E$. In copper smelting,hot air is used to convert to $CuSO_4$.
The correct answer is

The method,which is based on the principle that "different components of a mixture are differently adsorbed on an adsorbent" is called

Explain:
$(i)$ Zone refining
$(ii)$ Column chromatography.

Which metal is refined by Mond process?