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Eduncle posted an MCQ
October 19, 2019 • 19:44 pm 0 points
  • IIT JAM
  • Chemistry (CY)

Which of the following metal(s) is(are) extracted from its(their) sulfide ore(s) by self-reduction/air reduction method ?

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    Eduncle Best Answer

    Self reduction process : This process is also called autoreduction process or air reduction process. The sulphide ores of less electropositive metals like Hg, Pb, Cu etc., are heated in air as to convert part of the ore into oxide or sulphate which then reacts with the remaining sulphide ore to give the metal and sulphur dioxide. No external reducing agent is used in this process.

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