Which of the following sets are correctly matched?

Metal	Refining Process
$I$. $Hg$ (Mercury)	Distillation
$II$. $Cu$ (Copper)	Poling
$III$. $B$ (Boron)	Zone refining
$IV$. $Ti$ (Titanium)	Liquation

Which metal is ultrapurified using carbon monoxide?

Mercury is purified by:

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 Van-Arkel process and Mond's process are used for the refining of which of the following metals,respectively?

Which of the following elements is purified by vapour phase refining?