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CGP EDU Academic Team
Published on: August 13, 2026
Among the following metals the number of metals that are extracted by self-reduction method from their respective ores is Hg, Zn, Cu, Al, Mg, Pb, Fe, Na.
Text Solution
Verified by ExpertsThe correct answer is:
3
3
Self-Reduction Process: The cations of the less electropositive metals like Pb, Hg and Cu may be reduced without the use of any additional reducing agent.
Self-reduction of Cu:
2Cu 2 O + Cu 2 S 
6Cu + SO 2 (g)
It is called self-reducing because copper oxide itself reduced the copper sulflde to give copper and sulfur dioxide.
Similar reactions occurs for Pb and Hg.
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