Name two metals which are found in nature in the free state.

What chemical process is used for obtaining a metal from its oxide?

Define the following terms:
$(i)$ Mineral
$(ii)$ Ore
$(iii)$ Gangue

Give reasons: Platinum,gold,and silver are used to make jewellery.

Metallic oxides of zinc,magnesium,and copper were heated with the following metals. In which cases will you find displacement reactions taking place?

Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron).