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KCET2016ChemistryGeneral Principles and Processes of Isolation of Metals

Van-Arkel method of refining Zirconium involves,

Options

  1. Aremoving all oxygen and nitrogen impurities,
  2. Bremoving CO impurity
  3. Cremoving Hydrogen impurity
  4. Dremoving silica impurity

Correct answer

A. removing all oxygen and nitrogen impurities,

Step-by-step solution

van Arkel method is useful for removing all the oxygen and nitrogen present in the form of impurity in certain metals such as zirconium and titanium for getting ultra-pure metals. In this method the metal is converted to a volatile unstable compound taking care that the impurities are not affected during compound formation. The compound thus obtained is decomposed to get the pure metal.

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