General Principles And Processes of Isolation Of Elements

General Principles And Processes of Isolation Of Elements

Question

Which method of purification is represented by the following equation

Ti left parenthesis straight s right parenthesis space plus 2 straight I subscript 2 space left parenthesis straight g right parenthesis space rightwards arrow with 523 space straight K on top space Til subscript 4 space left parenthesis straight g right parenthesis
rightwards arrow with 1700 space straight K on top space Ti space left parenthesis straight s right parenthesis space plus space 2 space straight I subscript 2 space left parenthesis straight g right parenthesis

  • zone refining

  • cupellation

  • Polling

  • Van-Arkel

Answer

D.

Van-Arkel

Van-Arkel (and de-Boiser) process is based on the thermal decomposition of a volatile compound like an iodide, which is first formed by direct combination of metal to be purified and iodine.
The metallic iodide is then decomposed when heated at a higher temperature and thus the metal obtained in the purest form. Titanium and zirconium are purified by this method.

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