(a(i))[1]
State the type of reaction that calcium carbonate undergoes when it is heated strongly.
(a(ii))[1]
State whether calcium oxide is acidic or basic. Explain your answer.
(a(iii))[1]
Name the gas that calcium oxide removes in flue gas desulfurisation.
(b(i))[1]
Explain how this equation demonstrates that zinc oxide is reduced.
(b(ii))[1]
Name the remaining metal in brass.
(b(iii))[2]
Suggest two reasons why brass is chosen for water taps instead of pure zinc.
(c(i))[1]
State the harmful environmental effect of higher levels of sulfur dioxide.
(c(ii))[1]
State one strategy that would help remove carbon dioxide already present in the atmosphere.
(d)[2]
Arrange the four metals by reactivity, with the least reactive metal at the start.