State the equation for the reaction of coke with air in the blast furnace.

The product formed in part (i) reacts with coke to produce carbon monoxide. Explain, giving an equation, why this reaction is important in the extraction of iron.

${\text{C(s)}} + {{\text{O}}_2}{\text{(g)}} \to {\text{C}}{{\text{O}}_2}{\text{(g)}}$;

Ignore state symbols.

CO acts as a reducing agent / reaction is endothermic/cools (this part of) furnace;

${\text{C}}{{\text{O}}_2}{\text{(g)}} + {\text{C(s)}} \to {\text{2CO(g)}}/{\text{F}}{{\text{e}}_2}{{\text{O}}_3}{\text{(s)}} + {\text{3CO(g)}} \to {\text{2Fe(l)}} + {\text{3C}}{{\text{O}}_2}{\text{(g)}}$;

Ignore state symbols.

Generally the equation for the reaction of coke with air was given correctly.

The correct equation for the reaction of ${\text{C}}{{\text{O}}_2}$ with coke was sometimes missing