Auto reduction process is used in the extraction of
    (A)    Cu and Hg
    (B)    Zn and Hg
    (C)    Cu and Al
    (D)    Fe and Pb

Question

Auto reduction process is used in the extraction of (A) Cu and Hg (B) Zn and Hg (C) Cu and Al (D) Fe and Pb

Amit Saxena · Answer

Auto reduction process is used in the preparation of Co, Hg and Pb etc. which are less electropositive metal e.g., 2HgS + 3O 2 ----> 2HgO + 2SO 2 2HgO + HgS -----> 3Hg + SO 2

Druthi B · Answer

This process is also called autoreduction process or air reduction process. The sulphide ores of less electropositive metals like Hg, Pb, Cuetc., 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.
It’s first option i.e, Cu and Hg

Druthi B · Answer

This process is also called autoreduction process or air reduction process. The sulphide ores of less electropositive metals like Hg, Pb, Cuetc., 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.
It’s first option .

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Auto reduction process is used in the extraction of (A) Cu and Hg (B) Zn and Hg (C) Cu and Al (D) Fe and Pb

Auto reduction process is used in the extraction of
    (A)    Cu and Hg
    (B)    Zn and Hg
    (C)    Cu and Al
    (D)    Fe and Pb

3 Answers

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