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Question: Answered & Verified by Expert
In order to refine blister copper it is melted in a furnace and is stirred with green logs of wood. The purpose is
ChemistryGeneral Principles and Processes of Isolation of MetalsJEE Main
Options:
  • A To expel the dissolved gases in blister copper
  • B To bring the impurities to surface and oxidize them
  • C To increase the carbon content of copper
  • D To reduce the metallic oxide impurities with hydrocarbon gases liberated from the wood.
Solution:
1751 Upvotes Verified Answer
The correct answer is: To reduce the metallic oxide impurities with hydrocarbon gases liberated from the wood.
The blister copper is melted in reverberatory furnace and stirred with poles of green wood. Any oxide of copper formed is reduced to metallic copper by the reducing hydrocarbons of the wood. The process is called fire refining or poling.

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