Section I - Part B - Worth 45 Marks (As our option section is 40 Marks)
16. a) Draw styrene - 1
b) Give systematic name for polymer of styrene - 1
17. a) What are transuranic elements and give ONE example. - 2
b) Equation for alpha decay of americium-241 - 1
18. Explain how bromine water distinguished between.....include relevant equations, using structural formula. - 3
19. Evaluate the role that human activity and technology have played in altering the concentration of zone in the stratosphere. - 6
20. a) A poisonous gas present in photochemical smog is an allotrope of oxygen. Identify this gas. - 1
b) Describe another environmental issue associated with increased levels of NOx in the atmosphere including equations. - 2
21. a) Write Haber Process equation (balanced) - 1
b) Explain why the rate, but not the yield is increased at higher temps. - 3
22. a) Identify cation responsible for white ppt formed upon addition of HCl. - 1
b) Write a net ionic equation for reaction which produced a white ppt upon adding H2SO4. - 1
c) Justify the procedure followed by the student to identify these two cations. (Stimulus provided) - 3
23. a) Write equations for the reaction of sulfur to form an oxide and the reaction of the oxide with water. - 2
b) Name the products formed in each reaction. - 1
c) Oxides of sulfur can be released by both industrial and natural processes. Give examples to explain this statement. - 2
24. a) Draw a labeled diagram of a galvanic cell with lead and silver electrodes. - 2
b) Write half equations for the above cell and calculate cell voltage - 2
c) What are the standard conditions for a galvanic cell - 2
25. a) Explain in terms of Le Chatelier's principle what happens to solubility of CO2 as the top of a soda bottle lid is removed. - 2
b) Does CO2 become more or less soluble as the temperature of water decreases. Explain your answer. - 1
26. a) Describe what is meant by the term 'catchment' area. - 1
b) Identify TWO physical purification processes. - 2
c) Define eutrophication. - 1
d) Outline the cause of eutrophication - 1
Shipwrecks - 40 Marks (Only first two sections)
27. a) i) Outline the role of electron transfer.. - 2
ii) Contrast the comp, prop and uses of three types of steel - 9
b) i) Define rusting and describe the appearance of rust. - 2
ii) Outline the conditions for rusting and use equations to describe the process of rusting. - 9
c) i) Identify the main metal used to make ships. - 1
ii) Distinguish between active and passivating metals - 4
d) Outline the method followed to compare and describe the rate of corrosion in differing O2 concs and temps and describe the results you obtained. - 4
e) Outline and analyse the impact of the work of any THREE early scientists on our understanding of electron transfer reactions. - 6
f) Agar plate question with indicators:
i) Identify TWO valid conclusions that can be made from experiment - 1
ii) Explain why phenolphthalein goes a pink colour at the cathodes - 1
iii) Explain why potassium ferricyanide produces a blue colour at the anodes - 1
16. a) Draw styrene - 1
b) Give systematic name for polymer of styrene - 1
17. a) What are transuranic elements and give ONE example. - 2
b) Equation for alpha decay of americium-241 - 1
18. Explain how bromine water distinguished between.....include relevant equations, using structural formula. - 3
19. Evaluate the role that human activity and technology have played in altering the concentration of zone in the stratosphere. - 6
20. a) A poisonous gas present in photochemical smog is an allotrope of oxygen. Identify this gas. - 1
b) Describe another environmental issue associated with increased levels of NOx in the atmosphere including equations. - 2
21. a) Write Haber Process equation (balanced) - 1
b) Explain why the rate, but not the yield is increased at higher temps. - 3
22. a) Identify cation responsible for white ppt formed upon addition of HCl. - 1
b) Write a net ionic equation for reaction which produced a white ppt upon adding H2SO4. - 1
c) Justify the procedure followed by the student to identify these two cations. (Stimulus provided) - 3
23. a) Write equations for the reaction of sulfur to form an oxide and the reaction of the oxide with water. - 2
b) Name the products formed in each reaction. - 1
c) Oxides of sulfur can be released by both industrial and natural processes. Give examples to explain this statement. - 2
24. a) Draw a labeled diagram of a galvanic cell with lead and silver electrodes. - 2
b) Write half equations for the above cell and calculate cell voltage - 2
c) What are the standard conditions for a galvanic cell - 2
25. a) Explain in terms of Le Chatelier's principle what happens to solubility of CO2 as the top of a soda bottle lid is removed. - 2
b) Does CO2 become more or less soluble as the temperature of water decreases. Explain your answer. - 1
26. a) Describe what is meant by the term 'catchment' area. - 1
b) Identify TWO physical purification processes. - 2
c) Define eutrophication. - 1
d) Outline the cause of eutrophication - 1
Shipwrecks - 40 Marks (Only first two sections)
27. a) i) Outline the role of electron transfer.. - 2
ii) Contrast the comp, prop and uses of three types of steel - 9
b) i) Define rusting and describe the appearance of rust. - 2
ii) Outline the conditions for rusting and use equations to describe the process of rusting. - 9
c) i) Identify the main metal used to make ships. - 1
ii) Distinguish between active and passivating metals - 4
d) Outline the method followed to compare and describe the rate of corrosion in differing O2 concs and temps and describe the results you obtained. - 4
e) Outline and analyse the impact of the work of any THREE early scientists on our understanding of electron transfer reactions. - 6
f) Agar plate question with indicators:
i) Identify TWO valid conclusions that can be made from experiment - 1
ii) Explain why phenolphthalein goes a pink colour at the cathodes - 1
iii) Explain why potassium ferricyanide produces a blue colour at the anodes - 1
We got similar STAT scores as well >< got 163 
