(a)[5]
(i) Which reaction is used to raise the temperature inside the blast furnace? (ii) Which reaction is an example of thermal decomposition? (iii) In which reaction is carbon simultaneously oxidised and reduced? (iv) Which equation shows impurity being removed from the iron? (v) Which equation shows an acidic substance reacting with a basic substance?
(b(iii))[2]
Name two waste gases released from the blast furnace.
(c)[3]
(i) Describe how iron’s malleability alters as the percentage of carbon changes. (ii) Iron taken from the blast furnace has a high carbon content. Explain how the carbon content of the iron can be lowered.