D-And F-Block Elements Ques 102

Question: Which process of purification is represented by the following scheme $ \underset{impure}{\mathop{Ti}},+2I_2\xrightarrow{250^{o}C}TiI_4\xrightarrow{1400^{o}C}\underset{pure}{\mathop{Ti}},+I_2 $

[Kerala PMT 2004]

Options:

A) Cupellation

B) Poling

C) Electrolytic refining

D) Zone refining

E) Van-Arkel process

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Answer:

Correct Answer: E

Solution:

This scheme take place in Van Arekel process by this process ultrapure metal is prepared, the impure metal is first converted into a volatile stable compound generally iodide(leaving behind the impurities which is then decomposed at a higher temperature to give the pure metal. Metal like titanium, zirconium are purified by this method.



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