(a)[1]
Give the name of this zinc ore.
(b(i))[1]
Write a chemical equation for the reaction between zinc oxide and carbon.
(b(ii))[2]
State the kind of chemical change that occurs to the zinc in zinc oxide during this reaction. Explain why.
(b(iii))[1]
Explain why aluminium is not obtained from aluminium oxide by heating it with carbon.
(b(iv))[1]
Suggest one other method that could be used to extract zinc from zinc oxide.
(c)[3]
Explain, in particle terms, why brass is harder than pure zinc.