(a)[1]
State one environmental problem caused by carbon dioxide being produced as an atmospheric pollutant.
(b)[1]
State one environmental problem caused by sulfur dioxide being produced as an atmospheric pollutant.
(c(i))[2]
Explain, using ideas about particles, why the calcium carbonate has to be in powder form rather than as one solid lump.
(c(ii))[2]
Explain, using ideas about particles, why lowering the temperature reduces the rate of the reaction between calcium carbonate and sulfur dioxide.
(d(i))[1]
Explain why sulfur dioxide is oxidised in this reaction: $\text{2SO}_2 + \text{O}_2 \rightarrow \text{2SO}_3$.
(d(ii))[2]
Explain, using ideas about bond breaking and bond forming, why the reaction is exothermic.
(d(iii))[1]
Explain why adding a catalyst increases the reaction rate for this process.