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NEST2017ChemistryGeneral Principles and Processes of Isolation of Metals

Nickel metal is purified by vapour phase refining process. This process is based on the fact that

Options

  1. Anickel metal sublimes at high temperature.
  2. Bnickel reacts with carbon monoxide to form nickel carbonyl which decomposes at high temperature to form nickel
  3. Cnickel reacts with chlorine to form nickel chloride which is volatile and decomposes easily to nickel.
  4. Dnickel can be vapourized under vacuum leaving behind impurities.

Correct answer

B. nickel reacts with carbon monoxide to form nickel carbonyl which decomposes at high temperature to form nickel

Step-by-step solution

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