The process of purification of metals is represented by the following scheme
$T i + 2 l_{2} 250^{\circ} C \to T i l_{4}^{\circ} \begin{matrix} T i p u r e \end{matrix} + I_{2}$

cupellation

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poling

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electrolytic refining

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van-Arkel method

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Solution

The correct option is D van-Arkel method
van Arkel method is used for the refining of zirconium or titanium.
For example crude zirconium is converted to volatile zirconium tetraiodide and then decomposed on a thungsten filament to pure metal
$Z r + 2 I_{2} \to Z r I_{4}$

$Z r I_{4} \to Z r + 2 I_{2}$

The scheme for the purification of Ti is as given below.

$T i + 2 I_{2} 250^{\circ} C \to T i I_{4} 1400^{\circ} - -- \to \begin{matrix} T i p u r e \end{matrix} + I_{2}$

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Similar questions

T i i m p u r e + 2 I_{2} 250^{o} C - -- \to T i I_{4} 1400^{o} C - --- \to T i p u r e + 2 I_{2}

T i (s) + 2 I_{2} (g) 523 K - -- \to T i I_{4} (g) 1700 K - --- \to T i (s) + 2 I_{2} (g)

+ I_{2} \to

H e a t - -- \to

+ I_{2}

T i (s) + 2 I_{2} (g) 523 k - - \to T i l_{4} (g) 1700 k - -- \to T i (s) + 2 I_{2} (g)

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