~ Explain, using structure and bonding, why alloys are stronger and harder than pure metals.

~ Why is there a need to recycle metals?

~ Give 3 advantages of recycling metals.

~ Write down the 5 reactions in the blast furnace for the extraction of iron from haematite.

~ List down the metals reactivity series, from most reactive metal to the least reactive metal.

~ Describe, with the help of chemical equations, the reactions in the blast furnace which lead to the production of molten iron.

~ Describe, with the help of chemical equations, the reactions in the blast furnace which help to purify molten iron.