19-02-2025 20:50 19-02-2025 20:50 19-02-2025 20:50 Q1.Give the word and symbolic equation when octane reacts with water . [2] Q2.Define complete combustion. [2] Q3.What is the percentage of nitrogen in clean dry air. [1] 19-02-2025 . 20:50 19-02-2025 20:50 Q6. How can the burning of fossil fuels cause pollution of water in rivers and lakes?. [2] Q7. Carbon monoxide and oxides of nitrogen can be removed from exhaust gases by using a catalytic converter . Explain how, using a balanced symbolic equation in your answer. [2] Q8. What is photochemical smog? [1] Q9.Carbon dioxide in the atmosphere can cause global warming. Name another different gas that also causes global warming and name a natural source of the gas you mentioned . [2] Total : [30]
