Note : In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Zirconium also forms a volatile complex with Iodine which when decomposed gives pure Zr. It undergoes vapour phase refining and this process is called Van Arkel method.
Zr + 2I2→ ZrI4
ZrI4→Zr(pure) + 2I2 (at 1800K)