In which of the following metals extraction,i | vedclass

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(D) In the extraction of $Fe$ (iron),silica $(SiO_2)$ is added as a flux to remove $FeO$ impurity as iron silicate slag $(FeSiO_3)$.In the extraction

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$ii, iii, iv$ only

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(D) In the extraction of $Fe$ (iron),silica $(SiO_2)$ is added as a flux to remove $FeO$ impurity as iron silicate slag $(FeSiO_3)$.In the extraction of $Cu$ (copper),$FeS$ present as an impurity is removed as iron silicate slag $(FeSiO_3)$ by adding $SiO_2$ flux.In the extraction of $Zn$ (zinc),$FeO$ impurity is removed as iron silicate slag $(FeSiO_3)$ by adding $SiO_2$ flux.Therefore,$Fe$,$Cu$,and $Zn$ involve the removal of impurities as slag.

In which of the following metals extraction,impurities are removed as slag?
$i.$ $Al$ $\quad$ $ii.$ $Fe$
$iii.$ $Cu$ $\quad$ $iv.$ $Zn$
The correct option is

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In which of the following metals extraction,impurities are removed as slag?$i.$ $Al$ $\quad$ $ii.$ $Fe$$iii.$ $Cu$ $\quad$ $iv.$ $Zn$The correct option is