Question 25-27

Summary: 25. Explain the need for monitoring the products of a chemical reaction such as combustion. 26(a) Draw a graph using a fixed scale and data about lead concentrations. (b) Use the graph to interpret data. (c) State an hypothesis to account for variation in lead concentration observed. 27. Use a graph showing how ozone concentration changes with altitude to compare the environmental effects of the presence of ozone in the upper and lower atmosphere.

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Written Paper Section I Question 21 - 2010 HSC Written Paper Section I Question 22 - 2010 HSC Written Paper Section I Question 25 - 2010 HSC Written Paper Section I Question 26 - 2010 HSC Written Paper Section I Question 28 - 2010 HSC Written Paper Section I Question 29 - 2010 HSC Written Paper Section I Question 31 - 2010 HSC Written Paper Section I Question 10 - 2002 HSC Written Paper Section I Question 11 - 2002 HSC Written Paper Section I Question 12 - 2002 HSC Written Paper Section I Question 13 - 2002 HSC Written Paper Section I Question 14 - 2002 HSC Written Paper Section I Question 15 - 2002 HSC Written Paper Section I Question 20 - 2002 HSC Written Paper Section I Question 21 - 2002 HSC Written Paper Section I Question 22 - 2002 HSC Written Paper Section I Question 23 - 2002 HSC Written Paper Section I Question 24 - 2002 HSC Written Paper Section I Question 25 - 2002 HSC Written Paper Section I Question 26 - 2002 HSC Written Paper Section I Question 27 - 2002 HSC Written Paper Section I Question 6 - 2002 HSC Written Paper Section I Question 7 - 2002 HSC Written Paper Section I Question 8 - 2002 HSC Written Paper Section I Question 9 - 2002 HSC Written Paper Section I Question 10 - 2001 HSC Written Paper Section I Question 11 - 2001 HSC Written Paper Section I Question 12 - 2001 HSC Written Paper Section I Question 13 - 2001 HSC Written Paper Section I Question 14 - 2001 HSC Written Paper Section I Question 15 - 2001 HSC Written Paper Section I Question 19-21 - 2001 HSC Written Paper Section I Question 22-24 - 2001 HSC Written Paper Section I Question 5 - 2001 HSC Written Paper Section I Question 6 - 2001 HSC Written Paper Section I Question 7 - 2001 HSC Written Paper Section I Question 8 - 2001 HSC Written Paper Section I Question 9 - 2001 HSC

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