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Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/ Air Question Paper Level O Level Subject Chemistry Exam Board Cambridge International Examinations Topic Atmosphere and Environment Sub-Topic Air Booklet Question Paper Time Allowed: 37 minutes Score: /31 Percentage: /100 1 The table shows the composition of exhaust gases from an internal combustion engine. What is gas Y? A ammonia B argon C chlorine D nitrogen 2 Which two gases do not damage limestone buildings? A nitrogen and carbon monoxide B nitrogen dioxide and carbon monoxide C nitrogen dioxide and carbon dioxide D sulfur dioxide and carbon dioxide 3 What are the products of photosynthesis? A carbon dioxide and oxygen B carbon dioxide and water C glucose and water D glucose and oxygen Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/ 4 When a volcano erupts, which gas is produced in significant amounts? A carbon monoxide B methane C ozone D sulfur dioxide 5 Which atmospheric pollutant is produced by bacterial decay of vegetable matter? A carbon monoxide B methane C ozone D sulfur dioxide 6 CFC compounds were commonly used as aerosol propellants. The structure of one CFC compound is shown. F F C F C H H Cl Which element in this compound causes a depletion of ozone in the atmosphere? A carbon B chlorine C fluorine D hydrogen 7 Which gas is most likely to react with limestone? A ammonia B carbon monoxide C methane D sulfur dioxide Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/ 8 The noble gases, argon, helium, krypton and xenon, are present in air. Which noble gas is present in the largest proportion? A argon B helium C krypton D xenon 9 Which gas will react with ozone in the upper atmosphere of the Earth? A CF2Cl 2 B CH4 C CO2 D SO2 10 Which pair of gases could be removed from the atmosphere using calcium carbonate? A CO2 and O3 B CO and SO2 C CH4 and NO2 D NO2 and SO2 11 Which gas can be removed from the exhaust gases of a petrol-powered car by its catalytic converter? A carbon monoxide B carbon dioxide C nitrogen D steam Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/ 12 Which row shows both the correct source and the correct effect of the named pollutant? pollutant source effect A B C D carbon monoxide oxides of nitrogen ozone sulfur dioxide incomplete combustion of carbon-containing materials decaying vegetable matter photochemical reactions volcanoes global warming global warming acid rain acid rain 13 The gases coming from a car’s exhaust contain oxides of nitrogen How are these oxides formed? A Nitrogen reacts with carbon dioxide. B Nitrogen reacts with carbon monoxide. C Nitrogen reacts with oxygen. D Nitrogen reacts with petrol. 14 Which gas cannot be removed from the exhaust gases of a petrol-powered car by its catalytic converter? A carbon dioxide B carbon monoxide C hydrocarbons D nitrogen dioxide 15 Which gas burns in air to form only one product? A ammonia B carbon monoxide C hydrogen chloride D methane Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/ 16 Sulfur is burnt in air. Which statement about this reaction is correct? A Sulfur is oxidised to sulfur trioxide. B The gas formed turns aqueous potassium dichromate(VI) from orange to green. C The reaction is reversible. D The reaction needs a catalyst. 17 A catalytic converter in a car exhaust system speeds up the change of pollutants into less harmful products. Which change does not occur in a catalytic converter? A carbon dioxide → carbon B carbon monoxide → carbon dioxide C nitrogen oxides → nitrogen D unburned hydrocarbons → carbon dioxide and water 18 Which natural process can cause nitrogen oxides to be formed in the atmosphere? A bacterial decay of plants B lightning activity C photosynthesis D respiration 19 Methane is a greenhouse gas. Which process releases methane into the air? A combustion of petrol B decay of vegetable matter C photosynthesis D volcanic activity Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/ 20 Four current problems in our atmosphere are listed. 1 2 3 4 acid rain depletion of the ozone layer presence of greenhouse gases incomplete combustion of carbon compounds Which atmospheric pollutant is responsible for each problem? W W chlorofluorocarbons X X sulfur dioxide Y Z carbon monoxide carbon dioxide 21 Natural gas, petroleum and diesel are all used as energy sources. Which gas is not produced when these sources are burned? A carbon dioxide B carbon monoxide C hydrogen D water Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/ 22 The flow chart shows how impure water can be treated to produce drinkable water. impure water drinkable water pass through large-sized gravel pass through small-sized gravel pass through carbon pass chlorine through it What is not removed from the water by this process? A clay particles B microbes C nitrates D odours 23 A solid substance Z burns in air to form a product that is gaseous at 20 °C. What is Z? A hydrogen B carbon monoxide C carbon D magnesium 24 Why are catalytic converters fitted to car exhausts? A to decrease the amount of carbon dioxide emitted B to decrease the amount of nitrogen oxides emitted C to improve energy conservation D to reduce global warming Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/ 25 The table shows pollutants and their possible effects. Which line is not correct? pollutant effect A CFCs B CH4 C CO D NO2 cause destruction of the ozone layer forms photochemical smog is poisonous to humans forms acid rain 26 Vegetable matter is biodegradable. Which gas is released into the atmosphere when vegetable matter biodegrades? A carbon monoxide B methane C nitrogen dioxide D sulphur dioxide 27 To reduce atmospheric pollution, the waste gases from a coal-burning power station are passed through powdered calcium carbonate. Which waste gas will not be removed by the powdered calcium carbonate? A carbon monoxide, CO B nitrogen dioxide, NO2 C phosphorus(V) oxide, P2O5 D sulphur dioxide, SO2 Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/ 28 Which statements about the pollutant carbon monoxide are correct? 1 2 3 It is a colourless, odourless gas. It is formed by incomplete combustion of natural gas. It reacts with haemoglobin in the blood. A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 1, 1, 2 1, 29 Which gas is not produced when hydrocarbons are burnt in the internal combustion engine? A carbon dioxide B carbon monoxide C hydrogen D nitrogen oxides 30 The data gives the concentration, in parts of pollutant per billion parts of air, of polluting gases in four different industrialised cities. In which city are limestone buildings under greatest threat from pollution? city sulphur dioxide nitrogen dioxide ozone A 17 46 23 B 32 33 30 C 38 40 11 D 45 14 21 Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/ 31 Methane, sulphur dioxide and carbon dioxide are gases which affect the atmosphere and the environment. In what way do these gases affect the environment? methane sulphur dioxide carbon dioxide A B C D depletion of the ozone layer global warming photochemical smog global warming acid rain photochemical smog global warming acid rain global warming acid rain depletion of the ozone layer global warming Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/ uploads/Management/ question-paper-save-my-exams-the-home-of-revision.pdf