Which metal is purified using the Mond process?

Electric refining is used for refining of

Which of the following methods is $NOT$ used for the purification of metals?

Zone refining is based on the principle of

For the electrolytic refining of aluminium (Hoopes' process),the three fused layers consist of:

Bottom Layer	Middle Layer	Upper Layer

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