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

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is D Both Assertion and Reason are incorrect
Van Arkel method is used for refining Zirconium or Titanium. This method is very useful for removing all the oxygen and nitrogen present in the form of impurity in certain metals like $Z r$ and $T i$ . The crude metal is heated in an evacuated vessel with iodine.

The metal iodine being more covalent volatises.
$Z r + 2 I_{2} ⟶ Z r I_{4}$

The metal iodine is then decomposed.
$Z r I_{4} ⟶ Z r + 2 I_{2}$

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