D And F Block Elements Question 445
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.
BETA
