For which of the following metals is the self | vedclass

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(D) Self-reduction (also known as auto-reduction) is typically used for metals with low electropositivity,such as $Hg$,$Cu$,and $Pb$.$1. 	ext{ For }

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$Fe$

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(D) Self-reduction (also known as auto-reduction) is typically used for metals with low electropositivity,such as $Hg$,$Cu$,and $Pb$.$1. 	ext{ For } Hg: 2HgS + 3O_2$ $ightarrow 2HgO + 2SO_2; 2HgO + HgS$ $ightarrow 3Hg + SO_2$$2. 	ext{ For } Cu: 2Cu_2S + 3O_2$ $ightarrow 2Cu_2O + 2SO_2; 2Cu_2O + Cu_2S$ $ightarrow 6Cu + SO_2$$3. 	ext{ For } Pb: 2PbS + 3O_2$ $ightarrow 2PbO + 2SO_2; 2PbO + PbS$ $ightarrow 3Pb + SO_2$$Fe$ (Iron) is a more electropositive metal and is extracted by reduction with carbon (smelting) in a blast furnace,not by self-reduction.

For which of the following metals is the self-reduction process $NOT$ used?

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