(a)[1]
Balance the equation given: $\text{FeS}_2 + \text{O}_2 \rightarrow \text{Fe}_2\text{O}_3 + \text{SO}_2$.
(b)[1]
Describe one environmental issue caused by sulfur dioxide in the air.
(c)[3]
Describe the conversion of sulfur dioxide into sulfuric acid in the contact process.
(d)[1]
State one additional use of sulfur dioxide.
(e(i))[1]
In a blast furnace, iron(III) oxide, coke, limestone and hot air are heated together to produce molten iron. Describe the function in the blast furnace of coke.
(e(ii))[1]
Describe the role of limestone in a blast furnace.
(e(iii))[1]
Describe the role of hot air in the blast furnace.