Which method is used to obtain highly pure $Si$?

The method of zone refining of metals is based on the principle of

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

Refining of tin cannot be done by

Which metal is ultrapurified using carbon monoxide?

Identify the statements which are not correct.
$a)$ Copper is refined by Van-Arkel method
$b)$ Zinc is refined by electrolysis method
$c)$ Zirconium is refined by distillation method