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Assertion : van Arkel method is used for...

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

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.

Text Solution

Verified by Experts

The correct Answer is:
D
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)`
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