Identify the substance oxidised and reduced.
a) Fe2O3 + 2Al Al2O3+ 2Fe
b) Mg + 2HCl MgCl2 + H2
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here in a) Fe2O3 is reduced to 2Fe
and Al is oxidized to Al2O3
here in b) 2HCl is reduced to H2
and Mg is oxidised to MgCl2
and Al is oxidized to Al2O3
here in b) 2HCl is reduced to H2
and Mg is oxidised to MgCl2
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