Assertion : van Arkel method is used for refining of Zinc.
Reason : In this method impure is evaporated to obtain the pure metal as distillate .

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion .
B. if both assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but reason is false
D. If both assertion and reason are false.

Answer

D

Explanation

van Arkel method is used for refining of zirconium or titanium.
In this method crude metal is heated in an evacuated vessel with iodine .
`underset("Impure")(Zr) + 2I_(2) overset(Delta)to ZrI_(4)`
The metal iodide is decomposed on tungsten filament, and pure metal is deposited on the filament .
`ZrI_(4) overset(Delta) to underset("Pure")(Zr) +2I_(2)`