AQA-84022-QP-JUN13

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Cambridge AQA chemistry paper
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   AQA Level 1/2 CertificateJune 2013 Chemistry 8402/2 Paper 2Monday 10 June 2013 1.30 pm to 3.00 pm For this paper you must have:   a ruler    a calculator    the periodic table (enclosed). Time allowed   1 hour 30 minutes Instructions   Use black ink or black ball-point pen.   Fill in the boxes at the top of this page.   Answer all  questions.   You must answer the questions in the spaces provided. Do not write outside the box around each page or on blank pages.   Do all rough work in this book. Cross through any work you do not want to be marked. Information   The marks for questions are shown in brackets.   The maximum mark for this paper is 90.   You are expected to use a calculator where appropriate.   You are reminded of the need for good English and clear presentation in your answers.   Question 3(d) should be answered in continuous prose.In this question you will be marked on your ability to: – use good English – organise information clearly – use specialist vocabulary where appropriate. Advice   In all calculations, show clearly how you work out your answer. 8402/2 (Jun138402201) G/T94288 6/6/6/6/6 Centre NumberCandidate Number SurnameOther NamesCandidate SignatureFor Examiner’s UseExaminer’s InitialsQuestionMark 123456TOTAL  2 Do not write outside the box  (02) G/T94288/Jun13/8402/2  Answer   all  questions in the spaces provided.  1  Saturated hydrocarbons, for example methane and octane, are often used as fuels.  1 (a) Methane can be represented as:  HCHHH  1 (a) (i) The formula of methane is ............................................... . (1 mark)  1 (a) (ii) Draw a ring around the correct answer to complete the sentence.   In a saturated hydrocarbon molecule all of the bonds are double.ionic.single. (1 mark)  1 (a) (iii)  Draw a ring around the correct answer to complete the sentence.   The homologous series that contains methane and octane is called the alcohols.alkanes.alkenes. (1 mark)  1 (b) (i)  The complete combustion of petrol produces carbon dioxide, water vapour and sulfur dioxide. Name three  elements petrol must contain. 1 ......................................................................................................................................... 2 ......................................................................................................................................... 3 ......................................................................................................................................... (3 marks)  3 Do not write outside the box  (03) G/T94288/Jun13/8402/2 Turn over      1 (b) (ii)  The exhaust gases from cars can contain oxides of nitrogen. Complete the sentence. Nitrogen in the oxides of nitrogen comes from ................................................................ . (1 mark)  1 (b) (iii) The sulfur dioxide and oxides of nitrogen from cars cause an environmental problem. Name the problem and describe one  effect of the problem. Name of problem ............................................................................................................... Effect of problem ............................................................................................................... ............................................................................................................................................ (2 marks)  1 (c) When a fuel burns without enough oxygen, there is incomplete combustion. One gaseous product of incomplete combustion is carbon monoxide. Name one  solid product of incomplete combustion. ................................................................................ (1 mark) Question 1 continues on the next page  4 Do not write outside the box  (04) G/T94288/Jun13/8402/2  1 (d)  A student investigated how well different hydrocarbon fuels would heat up 100 g of water. Her hypothesis was: The more carbon atoms there are in a molecule of any fuel, the better the fuel is.  The apparatus the student used is shown in the diagram.  Hydrocarbon fuel100   g of water Calorimeter Thermometer Spirit burner   She burned each hydrocarbon fuel for 2 minutes. Her results are shown in the table. Name of hydrocarbon fuelNumber of carbon atoms in a molecule of hydrocarbon fuelTemperature change of water in ° C after 2 minutesTemperature change per g of fuel burnedObservations Pentane53060no smokeHexane64057very small amount of smoke Octane85555small amount of smokeDecane105752large amount of smokeDodecane126043very large amount of smoke
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