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Questions and Answers
What is the method for refining nickel described in the text?
What is the method for refining nickel described in the text?
- Fractional crystallization
- Electrolysis
- Distillation
- Zone refining (correct)
What is the compound formed when impure nickel is heated in a stream of carbon monoxide?
What is the compound formed when impure nickel is heated in a stream of carbon monoxide?
- Nickel tetracarbonyl (Ni[CO]4) (correct)
- Nickel carbide (Ni3C)
- Nickel carbonate (NiCO3)
- Nickel oxide (NiO)
What is the purpose of carrying out zone refining in an inert gas atmosphere?
What is the purpose of carrying out zone refining in an inert gas atmosphere?
- To increase the melting point of impurities
- To prevent the formation of metal oxides
- To accelerate the dissolution of impurities
- To prevent the oxidation of metals (correct)
Which elements are commonly refined using the zone refining process?
Which elements are commonly refined using the zone refining process?
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What happens to the impurities during the zone refining process?
What happens to the impurities during the zone refining process?
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