Question

Ti,Zr,Th purified by the method

Answer 1

Answer:

Ti , Zr , Th are purified by Van Arkel's process.

Explanation:

Crude metal is heated with a suitable substance so that the pure metal present in it may be converted into stable volatile compound leaving behind impurities. The compound so formed is then decomposed by heating to get the pure metal. This process is called Van Arkel's process.

example,

$Ti( impure) + 2I_{2} \frac{550K}{} > TiI_{4} (vapour)$

$TiI_{4}( vapour ) \frac{1800 K}{} > Ti (pure) + 2I_{2}$

Hope it helps !