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UK GCSE 2010 : Foundation Tier, Chemistry Paper 1

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Centre Number 71 Candidate Number General Certificate of Secondary Education 2010 Paper 1 Foundation Tier G1401 Science: Chemistry [G1401] WEDNESDAY 26 MAY, MORNING TIME 1 hour. INSTRUCTIONS TO CANDIDATES Write your Centre Number and Candidate Number in the spaces provided at the top of this page. Write your answers in the spaces provided in this question paper. Answer all five questions. INFORMATION FOR CANDIDATES The total mark for this paper is 90. Quality of written communication will be assessed in question 2(a)(iv). Figures in brackets printed down the right-hand side of pages indicate the marks awarded to each question or part question. A Data Leaflet which includes a Periodic Table of the Elements is provided. For Examiner s use only Question Number 1 2 3 4 5 Total Marks 5471 Marks 1 (a) The modern Periodic Table has been in use for over 100 years. Its development included the work of several chemists including John Newlands and Dmitri Mendeleev. Examiner Only Marks Remark (i) What name was given to the law developed by John Newlands? ___________________________________________________ [1] (ii) State three features of the Periodic Table developed by Mendeleev which are different from the modern Periodic Table. 1. ___________________________________________________ _____________________________________________________ 2. ___________________________________________________ _____________________________________________________ 3. ___________________________________________________ ___________________________________________________ [3] (b) The modern Periodic Table is made up of Groups and Periods. What name is given to the following Groups? Group I __________________________________________________ Group VII ______________________________________________ [2] 5471 2 [Turn over (c) Often a short form of the Periodic Table like the one shown below is used. Group I II III IV V VI VII H Li Examiner Only Marks Remark 0 He Be B C N O F Ne Na Mg Al Si P S Cl Ar K Ge As Se Br Kr Ca Ga Using ONLY the elements in the table above: (i) Name one noble gas. ___________________________________________________ [1] (ii) Name one element which is a liquid at room temperature and pressure. ___________________________________________________ [1] (iii) Name one diatomic gas. ___________________________________________________ [1] (iv) Name one non-metal which is a solid at room temperature and pressure. ___________________________________________________ [1] (v) Name one element which forms a simple ion with a charge of 2 ___________________________________________________ [1] (vi) Suggest one reason why hydrogen may be placed in Group I. _____________________________________________________ ___________________________________________________ [1] 5471 3 [Turn over (d) Group III of the Periodic Table contains the elements boron, aluminium and gallium. Examiner Only Marks Remark Group III 11 5B 27 13 Al 70 31 Ga All of these elements form compounds with oxygen and chlorine. (i) Write the formula of aluminium oxide. ___________________________________________________ [1] (ii) Write a balanced symbol equation for the reaction of aluminium with chlorine. ___________________________________________________ [3] (iii) In which period of the Periodic Table is gallium found? ___________________________________________________ [1] (iv) Group III contains one non-metallic element. Name this element. ___________________________________________________ [1] (v) The elements of Group III can form a simple ion with a 3+ charge. Name one other element, apart from those in Group III, which forms an ion with a 3+ charge. You may use your Data Leaflet to help answer this question. ___________________________________________________ [1] 5471 4 [Turn over 2 Water is essential for life and is made up of two elements. Water melts at 0 C and boils at 100 C. Examiner Only Marks Remark (a) (i) Write the chemical formula of water. ___________________________________________________ [1] (ii) State two other physical properties of water. _____________________________________________________ ___________________________________________________ [2] (iii) Name the two elements that make up water. ___________________________________________________ [2] (iv) Describe a chemical test for water and state the result for a positive test. _____________________________________________________ _____________________________________________________ ___________________________________________________ [3] Quality of written communication [2] (b) Many substances, such as sodium hydroxide and anhydrous calcium chloride, interact with moist air. (i) Describe the observations made when some pellets of sodium hydroxide are left on a watch glass in the laboratory for several days. _____________________________________________________ _____________________________________________________ _____________________________________________________ ___________________________________________________ [3] (ii) What do you understand by the term anhydrous? _____________________________________________________ ___________________________________________________ [2] 5471 5 [Turn over (c) Some substances dissolve very well in water and are said to have high solubility. Examiner Only Marks Remark (i) Explain what is meant by the term solubility. _____________________________________________________ _____________________________________________________ _____________________________________________________ ___________________________________________________ [4] (ii) A student wants to dissolve some crystals in water. State two things the student could do to ensure the crystals dissolved quickly. 1. ___________________________________________________ 2. _________________________________________________ [2] 5471 6 [Turn over 3 (a) Use the words from the following list to complete the passage below about the element sulphur. Each may be used once, more than once, or not at all. metal allotropes plastic blue graphite insoluble monoclinic isotopes yellow Examiner Only Marks Remark soluble non-metal The element sulphur is a ___________. It has an atomic number of 16. Sulphur exists in three different solid forms known as ___________. One form is known as rhombic sulphur whilst the other two forms are known as ___________ sulphur and ___________ sulphur. Sulphur is ___________ in colour and is ___________ in water. [6] (b) Sulphur undergoes combustion when heated in air. (i) Write a balanced symbol equation for the combustion of sulphur. ___________________________________________________ [2] (ii) Describe what would be observed when sulphur undergoes combustion. _____________________________________________________ _____________________________________________________ ___________________________________________________ [3] 5471 7 [Turn over (c) Air pollution is caused by the presence of substances which are bad for health. One of the main pollutants in air is sulphur dioxide. Examiner Only Marks Remark (i) Name one source of sulphur dioxide pollution. ___________________________________________________ [1] (ii) Sulphur dioxide reacts with water vapour in the air to form acid rain. Write a balanced symbol equation for this reaction. ___________________________________________________ [2] (iii) Acid rain is a weak acid. Suggest the pH value of a sample of acid rain. ___________________________________________________ [1] (iv) State two effects of acid rain. 1. ___________________________________________________ _____________________________________________________ 2. ___________________________________________________ ___________________________________________________ [2] (v) Suggest two ways of preventing the formation of acid rain. 1. ___________________________________________________ _____________________________________________________ 2. ___________________________________________________ ___________________________________________________ [2] 5471 8 [Turn over BLANK PAGE (Questions continue overleaf) 5471 9 [Turn over 4 Lithium is a metal which is used in LCD televisions, computer monitors and mobile phones. Examiner Only Marks Remark mart_m / iStockphoto (a) Most lithium is obtained from lithium carbonate. The diagram below shows how solid lithium is produced from lithium carbonate. lithium carbonate Process A lithium chloride solution recrystallisation solid lithium chloride heating molten lithium chloride electrolysis molten lithium Process B solid lithium 5471 10 [Turn over (i) Name the acid which would be added to lithium carbonate in Process A to make lithium chloride solution. Examiner Only Marks Remark ___________________________________________________ [1] (ii) Write the chemical formula for lithium chloride. ___________________________________________________ [1] (iii) What must be done to convert molten lithium to solid lithium in Process B? ___________________________________________________ [1] (iv) Explain what is meant by the term electrolysis. _____________________________________________________ ___________________________________________________ [2] (b) Complete the table below by placing a tick ( ) to indicate if the substance conducts electricity or does not conduct electricity. Place only one tick for each substance. Substance Conducts electricity Does not conduct electricity solid lithium molten lithium molten lithium chloride solid lithium chloride lithium chloride solution [5] 5471 11 [Turn over (c) The electrolysis of molten lithium chloride may be carried out using the apparatus shown below. Examiner Only Marks Remark + electrode A electrode B crucible molten lithium chloride tripod HEAT heatproof mat (i) Name electrode A and electrode B. Electrode A ___________________________________________ Electrode B _________________________________________ [2] (ii) What material is used to make the electrodes? ___________________________________________________ [1] (iii) State one reason why this material is chosen to make the electrodes. ___________________________________________________ [1] (iv) At which electrode, A or B, is lithium produced? ___________________________________________________ [1] 5471 12 [Turn over BLANK PAGE (Questions continue overleaf) 5471 13 [Turn over 5 Fossil fuels are formed when dead plants and animals are subjected to heat and pressure over millions of years. They are non-renewable fuels. Examiner Only Marks Remark (a) (i) Name three fossil fuels. 1. ___________________________________________________ 2. ___________________________________________________ 3. _________________________________________________ [3] (ii) Explain the meaning of the term non-renewable. _____________________________________________________ _____________________________________________________ ___________________________________________________ [2] (b) Fossil fuels undergo combustion when heated in air. The hydrocarbon methane is a widely used fuel. (i) What do you understand by the term combustion? _____________________________________________________ _____________________________________________________ ___________________________________________________ [3] (ii) Explain what is meant by the term hydrocarbon. _____________________________________________________ ___________________________________________________ [2] (iii) Write a balanced symbol equation for the complete combustion of methane. ___________________________________________________ [3] 5471 14 [Turn over (iv) State two environmental problems caused by the combustion of fossil fuels. Examiner Only Marks Remark 1. ________________________________________________________ _____________________________________________________ 2. ________________________________________________________ ___________________________________________________ [2] (c) If methane burns in a limited supply of air, a toxic product forms. Name this product. _______________________________________________________ [1] THIS IS THE END OF THE QUESTION PAPER 5471 15 [Turn over Permission to reproduce all copyright material has been applied for. In some cases, efforts to contact copyright holders may have been unsuccessful and CCEA will be happy to rectify any omissions of acknowledgement in future if notified. 1847-029-1

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