Question

Which following method is used for refining of impure zirconium?

• A. Liquation
• B. Zone refining
• C. Polling
• D. Van Arkel method

Hint:

The Van Arkel method involves heating the metal with iodine to form a volatile compound, which is then decomposed to obtain the pure metal.

Answer 1

The Correct Option is D

Step 1: Understanding the Van Arkel method.
The Van Arkel method is a process used for refining certain metals, including zirconium. It involves heating the impure metal in a vacuum with iodine to form a volatile compound, which is then decomposed to give pure metal. This method is effective for refining metals with high boiling points.

Step 2: Analyzing the options.
(A) Liquation: Liquation is used to separate metals with different melting points, not specifically for zirconium.
(B) Zone refining: Zone refining is used for semiconductors like silicon, not for zirconium.
(C) Polling: Polling is a method used to remove impurities from molten metals but is not applicable for zirconium refining.
(D) Van Arkel method: Correct — The Van Arkel method is used for the refining of zirconium.

Step 3: Conclusion.
The correct answer is (D) Van Arkel method.