The Atmosphere · CAPE Chemistry Unit 2

73 past-paper questions on The Atmosphere, part of Industry and the Environment, from every CAPE Chemistry Unit 2 paper on Quelpr.

1. 5(b)(i)2 marks· CAPE Chemistry Unit 2 · 2005 · Paper 2Stain removers oxidize coloured compounds to colourless complexes. Suggest ONE reason why an ozone-producing formulation is believed to produce brighter, whiter clothes than bleach does.
2. 8(a)(ii)2 marks· CAPE Chemistry Unit 2 · 2005 · Paper 2Explain how sulphur dioxide (SO2) modifies the atmosphere.
3. 8(b)(i)4 marks· CAPE Chemistry Unit 2 · 2005 · Paper 2Write an equation for the reaction between CaCO3 and SO2, and explain the underlying principle of the action of the carbonate scrubber.
4. 8(b)(ii)6 marks· CAPE Chemistry Unit 2 · 2005 · Paper 2Calculate the mass of CaCO3, in kg, needed in a slurry to extract the SO2 present in 10 m3 of industrial waste gases at r.t.p., if SO2 comprises 10% of this volume.
5. 9(a)(i)5 marks· CAPE Chemistry Unit 2 · 2005 · Paper 2Explain the need for concern regarding ozone depletion and human health.
6. 9(a)(ii)3 marks· CAPE Chemistry Unit 2 · 2005 · Paper 2Describe THREE properties of CFCs that contributed to their widespread use.
7. 9(b)(ii)5 marks· CAPE Chemistry Unit 2 · 2005 · Paper 2Use CFC-12 as an example to write chemical equations that demonstrate the impact of CFCs on the ozone layer.
8. 9(c)(i)3 marks· CAPE Chemistry Unit 2 · 2005 · Paper 2Explain the underlying chemical principle in this natural steady-state process of ozone formation and destruction.
9. 9(c)(ii)2 marks· CAPE Chemistry Unit 2 · 2005 · Paper 2Write chemical equations representing the natural processes of formation and destruction of ozone.
10. 9(e)(i)2 marks· CAPE Chemistry Unit 2 · 2006 · Paper 2State TWO reasons why the use of leaded petrol is hazardous to human health.
11. 9(e)(ii)5 marks· CAPE Chemistry Unit 2 · 2006 · Paper 2Account for the presence of carbon monoxide and nitrogen oxides in the exhaust gases of cars. Write a balanced equation for the formation of ONE oxide of nitrogen.
12. 9(e)(iii)2 marks· CAPE Chemistry Unit 2 · 2006 · Paper 2Suggest TWO means by which the amount of carbon monoxide and nitrogen oxides in vehicle exhaust fumes may be reduced to minimize pollution levels.
13. 8(b)(i)6 marks· CAPE Chemistry Unit 2 · 2007 · Paper 2Explain how NO2 and SO2 are produced during the combustion of fossil fuels, illustrating with balanced equations.
14. 8(b)(ii)2 marks· CAPE Chemistry Unit 2 · 2007 · Paper 2State the environmental implications of releasing NO2 and SO2 into the atmosphere.
15. 8(c)(i)2 marks· CAPE Chemistry Unit 2 · 2007 · Paper 2Explain why leaded compounds and carbon monoxide are considered pollutants.
16. 8(c)(ii)2 marks· CAPE Chemistry Unit 2 · 2007 · Paper 2Explain the source of PbO and carbon monoxide in vehicular exhaust.
17. 8(c)(iii)1 mark· CAPE Chemistry Unit 2 · 2007 · Paper 2State ONE step taken to reduce the amount of lead pollution caused by vehicle fuel.
18. 9(a)(i)6 marks· CAPE Chemistry Unit 2 · 2007 · Paper 2Write equations showing the formation of stratospheric ozone and how ozone levels are maintained naturally in the stratosphere.
19. 9(a)(ii)3 marks· CAPE Chemistry Unit 2 · 2007 · Paper 2Explain the biological significance of stratospheric ozone.
20. 9(b)4 marks· CAPE Chemistry Unit 2 · 2007 · Paper 2Give FOUR reasons why ozone is considered a pollutant in the troposphere (lower atmosphere).
21. 9(c)(i)3 marks· CAPE Chemistry Unit 2 · 2007 · Paper 2State THREE properties that made CFCs suitable for use as aerosol propellants.
22. 9(c)(ii)2 marks· CAPE Chemistry Unit 2 · 2007 · Paper 2State TWO other uses of CFCs or Freons.
23. 9(d)2 marks· CAPE Chemistry Unit 2 · 2007 · Paper 2Give TWO reasons why CFCs are so destructive to the stratospheric ozone layer.
24. 3(a)(i)2 marks· CAPE Chemistry Unit 2 · 2009 · Paper 2Define the term 'nitrogen fixation'.
25. 3(a)(ii)2 marks· CAPE Chemistry Unit 2 · 2009 · Paper 2State TWO ways by which nitrogen fixation can occur.
26. 3(b)2 marks· CAPE Chemistry Unit 2 · 2009 · Paper 2Write ONE balanced equation involving nitrogen in the production of acid rain.
27. 3(c)2 marks· CAPE Chemistry Unit 2 · 2009 · Paper 2Suggest TWO human activities which may contribute to the disruption of the atmospheric equilibrium.
28. 3(a)(i)2 marks· CAPE Chemistry Unit 2 · 2010 · Paper 2Identify two gases present in unpolluted air that contribute to rain water having a pH of 5.6.
29. 3(a)(ii)2 marks· CAPE Chemistry Unit 2 · 2010 · Paper 2Identify a natural source for each of the two gases identified in (a)(i).
30. 3(a)(iii)2 marks· CAPE Chemistry Unit 2 · 2010 · Paper 2Write a balanced chemical equation showing the reaction of one of the gases from (a)(i) with water.
31. 3(b)(i)2 marks· CAPE Chemistry Unit 2 · 2010 · Paper 2Briefly outline two factors responsible for acid rain in industrialized, heavily populated areas.
32. 3(b)(ii)2 marks· CAPE Chemistry Unit 2 · 2010 · Paper 2Suggest two environmental effects of acid rain.
33. 6(a)4 marks· CAPE Chemistry Unit 2 · 2011 · Paper 2Identify the unlabelled components, A, B, C and D, in Figure 2.
34. 6(b)2 marks· CAPE Chemistry Unit 2 · 2011 · Paper 2State TWO human activities that have led to the disturbance of the balance of the nitrogen and carbon cycles.
35. 6(c)9 marks· CAPE Chemistry Unit 2 · 2011 · Paper 2Explain, with the use of relevant equations, the processes which allow for the maintenance of the concentration of ozone in the stratosphere, discussing oxygen formation and decomposition.
36. Q411 mark · multiple choice· CAPE Chemistry Unit 2 · 2012 · Paper 1Which of the following is NOT a greenhouse gas?
37. Q421 mark · multiple choice· CAPE Chemistry Unit 2 · 2012 · Paper 1A balanced equation for the photochemical decomposition of Freon-11 is
38. Q431 mark · multiple choice· CAPE Chemistry Unit 2 · 2012 · Paper 1A balanced equation for the production of oxygen from ozone is
39. 6(c)4 marks· CAPE Chemistry Unit 2 · 2012 · Paper 2Write TWO equations for the conversions of carbon monoxide and nitrogen monoxide to carbon dioxide and nitrogen, respectively, in catalytic converters.
40. 6(d)(i)2 marks· CAPE Chemistry Unit 2 · 2012 · Paper 2Write an equation to support the reason that sulphur dioxide is a pollutant because it produces acid rain.
41. Q331 mark · multiple choice· CAPE Chemistry Unit 2 · 2013 · Paper 1Which of the following may be a result of light-induced reaction of pollutants in the air? I. Global warming II. Photochemical smog III. Greenhouse effect
42. Q421 mark · multiple choice· CAPE Chemistry Unit 2 · 2013 · Paper 1When chlorofluorocarbons in the upper atmosphere are impacted by ultraviolet radiation, chlorine radicals are formed in preference to fluorine radicals. This occurs in the upper atmosphere because the energy of the
43. Q431 mark · multiple choice· CAPE Chemistry Unit 2 · 2013 · Paper 1Chlorofluorocarbons undergo homolytic fission by being exposed to ultraviolet light in the stratosphere. Which radical could result from \text{CH}_2\text{FCF}_2\text{Cl}?
44. Q401 mark · multiple choice· CAPE Chemistry Unit 2 · 2014 · Paper 1Items 40-41 refer to the following information. Aerosol propellants such as Freon-11, \text{CCl}_3\text{F}, are of major concern because of their photochemical reaction with ozone, \text{O}_3. Ultraviolet radiation…
45. Q411 mark · multiple choice· CAPE Chemistry Unit 2 · 2014 · Paper 1A balanced equation for the photochemical decomposition of Freon-11 is
46. Q421 mark · multiple choice· CAPE Chemistry Unit 2 · 2014 · Paper 1Chlorofluorocarbons undergo homolytic fission by being exposed to ultraviolet light in the stratosphere. Which radical could result from \text{CH}_2\text{FCF}_2\text{Cl}?
47. Q431 mark · multiple choice· CAPE Chemistry Unit 2 · 2014 · Paper 1Which of the following compounds is NOT a primary pollutant?
48. Q441 mark · multiple choice· CAPE Chemistry Unit 2 · 2014 · Paper 1Which of the following resources are normally associated with the formation of photochemical smog? I. Nitrogen oxides II. Sunlight III. Volatile organic resources
49. 6(a)(i)5 marks· CAPE Chemistry Unit 2 · 2014 · Paper 2Explain, with the aid of relevant equations, the destruction of stratospheric ozone.
50. 6(a)(ii)1 mark· CAPE Chemistry Unit 2 · 2014 · Paper 2Identify a man-made activity which contributes to stratospheric ozone destruction.
51. 6(a)(iii)2 marks· CAPE Chemistry Unit 2 · 2014 · Paper 2State TWO effects of stratospheric ozone destruction on human life.
52. Q331 mark · multiple choice· CAPE Chemistry Unit 2 · 2015 · Paper 1Which of the following occurrences may be a result of a light-induced reaction of pollutants in the air? I. Global warming II. Photochemical smog III. Greenhouse effect
53. Q391 mark · multiple choice· CAPE Chemistry Unit 2 · 2015 · Paper 1In which layer of the atmosphere is ozone detrimental to human health and vegetation?
54. Q431 mark · multiple choice· CAPE Chemistry Unit 2 · 2015 · Paper 1Chlorofluorocarbons undergo homolytic fission by being exposed to ultraviolet light in the stratosphere. Which radical could result from \text{CH}_2\text{FCF}_2\text{Cl}?
55. 6(c)(i)3 marks· CAPE Chemistry Unit 2 · 2015 · Paper 2Assess the impact of CFCs on the environment.
56. 6(c)(ii)3 marks· CAPE Chemistry Unit 2 · 2015 · Paper 2Suggest THREE reasons to support the statement: 'Like CFCs, the products of the combustion of fossil fuels also have a negative effect on the environment.'
57. Q331 mark · multiple choice· CAPE Chemistry Unit 2 · 2016 · Paper 1Chlorofluorocarbons undergo homolytic fission by being exposed to ultraviolet light in the stratosphere. Which radical could result from \text{CH}_2\text{FCF}_2\text{Cl}?
58. Q411 mark · multiple choice· CAPE Chemistry Unit 2 · 2016 · Paper 1In which layer of the atmosphere does ozone act as a pollutant?
59. Q421 mark · multiple choice· CAPE Chemistry Unit 2 · 2016 · Paper 1Which of the following resources are normally associated with the formation of photochemical smog? I. Nitrogen oxides II. Sunlight III. Volatile organic resources
60. Q431 mark · multiple choice· CAPE Chemistry Unit 2 · 2016 · Paper 1Which of the following compounds is NOT a primary pollutant?
61. Q441 mark · multiple choice· CAPE Chemistry Unit 2 · 2016 · Paper 1It can be concluded from the graph that I. aldehydes and ozone are secondary pollutants II. hydrocarbons are secondary pollutants III. nitrogen monoxide is a primary pollutant
62. Q391 mark · multiple choice· CAPE Chemistry Unit 2 · 2017 · Paper 1In which layer of the atmosphere is ozone detrimental to human health and vegetation?
63. 3(a)(i)1 mark· CAPE Chemistry Unit 2 · 2017 · Paper 2State the reason why the presence of ozone in the stratosphere is beneficial to humans.
64. 3(a)(ii)4 marks· CAPE Chemistry Unit 2 · 2017 · Paper 2Write the relevant equations showing the formation of ozone in the stratosphere.
65. 3(b)(i)2 marks· CAPE Chemistry Unit 2 · 2017 · Paper 2List TWO harmful effects of tropospheric ozone on humans.
66. 3(b)(ii)3 marks· CAPE Chemistry Unit 2 · 2017 · Paper 2Describe, with relevant equations, the production of tropospheric ozone resulting from the use of internal combustion engines.
67. 3(b)(i)2 marks· Chemistry · Unit 2 Q3 3(b)(i)Identify the condition that causes a bond in CCl₄ to break in the upper atmosphere. Deduce an equation for the formation of the reactive species.
68. 3(b)(ii)2 marks· Chemistry · Unit 2 Q3 3(b)(ii)The reactive species formed from CCl₄ act as catalysts in the decomposition of ozone. Write TWO equations to show how EACH of these species acts as catalysts.
69. 3(b)(iii)1 mark· Chemistry · Unit 2 Q3 3(b)(iii)State the name given to this upper atmosphere.
70. 3(b)(iv)2 marks· Chemistry · Unit 2 Q3 3(b)(iv)Discuss the importance of the ozone layer to all life on planet earth.
71. 3(c)(i)5 marks· Chemistry · Unit 2 Q3 3(c)(i)Identify the components labelled A, B, C, D and E in Figure 1.
72. 3(c)(ii)3 marks· Chemistry · Unit 2 Q3 3(c)(ii)Explain how this initiative will help maintain levels of oxygen and carbon dioxide in the atmosphere.
73. 3(d)2 marks· Chemistry · Unit 2 Q3 3(d)Write the equations that show the formation of these oxides.