(a(i))[1]
Name the change of state that occurs when a solid becomes a liquid.
(a(ii))[4]
Use the kinetic particle theory to describe the differences between solid aluminium and liquid aluminium in terms of: • the separation of the particles • the motion of the particles.
(b)[1]
Explain why aluminium is extracted by electrolysis instead of by reduction with carbon.
(c)[2]
Give two reasons for using aluminium in aircraft manufacture.
(d)[1]
Give one benefit of recycling aluminium.
(e)[2]
Arrange the four metals in order of reactivity. Start with the least reactive metal.
(f(i))[1]
State the main source of methane.
(f(ii))[1]
State one harmful effect of methane on the environment.