2. Aluminium is prepared industrially from purified bauxite by electrolytic reduction,
(a) (i) Write the formula of the oxide
(ii) Write the cathode half-reaction for the process
(2 marks)
(b) (i) Can chemical reduction be used to extract Al from its ore?
(ii) Explain
(2 marks)
(c) (i) Why are Al extraction plants usually located near power stations? (1 mark)
(d) Give one large scale use of Al and relate this use to its property.
Use: __________
Property: ___________
(2 marks)
(e) (i) State one metal that can be extracted by chemical reduction.
(ii) Name an ore from which this metal is extracted
(iii) Write an equation for the extraction process
(3 marks)
(Total = 10 marks)
3. A homologous series of organic compounds has the general formula CnH2n+1OH.
(a) (i) What is a homologous series?
(ii) Give the general name of this homologous series
(iii) Name the second member of this series
(3 marks)
(b) Members of the above series can’ react with metals.
(i)Write a balanced equation to show how the second member of the series reacts with Sodium
(ii) Name the non- gaseous product formed in b(i) above.
(2 marks)
(c) The second member of the series reacts with ethanoic acid.
(i) What name is given to this type of reaction?
(ii) Write an equation for the reaction.
(2 marks)
(d) State one simple test for members of this homologous series (1 mark)
(e) State two large Scale uses of the second member of this homologous series.
(2 marks)
Total 10 marks
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