Some examples of using waste

Knowing more chemistry can help you to become a more informed and a better citizen. 

If you score less than 80%, then work through the text and re-test yourself at the end by using this same test. If you still get a low score then re-work the topic at a later date. 1 CFCs are a group of compounds called chlorofluorocarbons.  

CHCI2F. 5 Cl (atoms) from any source, including CFCs (2) 

Cl -1- O3 CIO + O2. 6 The gas causing an increase in the greenhouse effect is carbon dioxide released by combustion of fossil fuels. It allows most of the Sun s radiation through to the Earth s surface but, when the warm surface gives out infra-red radiation it stops this radiation from escaping into space. Hence, an increase in the concentration of CO2 in the atmosphere makes the atmosphere a better insulating (2) 

7 Sulfur dioxide and any oxide of nitrogen. 8 Catalytic converters break down harmful oxides of nitrogen present in exhaust fumes to nitrogen and convert carbon monoxide to carbon dioxide, and so purify the gases let (2) 

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