Whatis VanArkelmethodofobtainingultrapuremetals ? – InterviewSolution

InterviewSolution

1.	Whatis VanArkelmethodofobtainingultrapuremetals ?
Answer» Solution :The impuremetal (TI orZr) isfirstconvertedintoitsvolatile iodilebyheatingwith ` I _2`at somelowtemperature. Thevolatile iodidethusformedisseparated fromimpurities.It isdecomposedatasuitable high temperatureto givethepuremetal. Forexample, `underset (("Impure"))(Zr (s)) +2 I_2 (G) overset(870 K ) toZrl_4 (g)overset (2075 K )underset ("W filament") tounderset (("PURE"))(Zr(s)) +2I_2 (g) `

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