Question

in van arkel metod for refining zirconium or titanium the halogen used is​

Answer 1

Van Arkel is an eligible method which can be used to refine Zirconium or Titanium. In this process, the non-metal gases like oxygen and nitrogen are consider as impurities, which are further abolished by heating metal in an evacuated vessel with iodine. Its being heated at about 1800k and at last the residue which settles over a filament is called a pure form of metal.

Answer 2

In van Arkel method for refining of zirconium or titanium the halogen used is​ IODINE.

- This method is very useful to remove the oxygen and nitrogen impurities from the metals.

- These metals are heated in an evacuated vessel in the presence of iodine.

- The metal reacts with iodine to form metal iodide and it volatilises:

Zr + 2 I2 → ZrI4

- Then tungsten filament is used to decompose it at around 1800 K and get the pure metal:

ZrI4 → Zr + 2 I2