Band 5/6 Response 2
The response to question 25 demonstrates a thorough knowledge and understanding of the need for monitoring the products of a chemical reaction such as combustion. It uses appropriate equations and acknowledges that different products can be formed under different reaction conditions, including those due to the presence of impurities. The response is well structured; however, it could be strengthened by including chemical equations for reaction products resulting from impurities in the fuel and the air and that also need monitoring.
