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Which method of purification is represented by the following equation

Question:

Which method of purification is represented by the following equation :

$\mathrm{Ti}(\mathrm{s})+2 \mathrm{I}_{2}(\mathrm{~g}) \stackrel{\mathrm{s} 23 \mathrm{~K}}{\longrightarrow} \mathrm{TiI}_{4}(\mathrm{~g}) \stackrel{1700 \mathrm{~K}}{\longrightarrow} \mathrm{Ti}(\mathrm{s})+2 \mathrm{I}_{2}(\mathrm{~g})$

  1. Van Arkel

  2. Zone refining

  3.  Cupellation

  4.  Poling

Correct Option: 1

Solution:

Ti,Zr,Hg etc can be purified by Van Arkel's process.

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