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During the extraction of $Fe$,which reaction is performed in the combustion zone?
- A$CaO + SiO_2 \to CaSiO_3$
- B$FeO + SiO_2 \to FeSiO_3$
- C$Fe_2O_3 + CO \to Fe + CO_2$
- DNone of these
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$2[Au(CN)_2]^-(aq) + Zn(s) \to [Zn(CN)_4]^{2-}(aq) + 2Au(s)$
$X$ and $Y$ are:
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