Question
Chemistry Question on General Principles and Processes of Isolation of Elements
Van-Arkel method of refining Zirconium involves,
A
removing all oxygen and nitrogen impurities.
B
removing CO impurity
C
removing Hydrogen impurity
D
removing silica impurity
Answer
removing all oxygen and nitrogen impurities.
Explanation
Solution
The van-Arkel method of refining zirconium involves removal of all oxygen and nitrogen impurities.
In this method, the impure metal is heated with iodine in a sealed vessel, so that metal forms volatile metallic iodide and impurities do not react with iodine.
The metallic iodide is then decomposed when purified further at higher temperature.