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UK GCSE 2006 : Foundation Tier, Chemistry Paper 2

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Centre Number 71 Candidate Number General Certificate of Secondary Education 2006 Paper 2 Foundation Tier G1402 Science: Chemistry [G1402] THURSDAY 22 JUNE, AFTERNOON TIME 1 hour 30 minutes. 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 six questions. INFORMATION FOR CANDIDATES The total mark for this paper is 120. Quality of written communication will be assessed in Question 2(d). 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 6 Total Marks G142F6 879 Marks 1 (a) Using the following terms, fill in the blanks in the paragraph below about the Periodic Table. Atomic Mass Mendeleev Increases Decreases Periods Groups Newlands Examiner Only Marks Remark One Seven In 1869, a Russian chemist called _______________ produced a Periodic Table very similar to the one we use today. The elements of the modern Periodic Table are arranged in order of increasing _______________ number. In the Periodic Table, the horizontal rows are called _______________ and the vertical columns of elements are called groups. The halogens are a group of reactive non-metals found in Group _______________ . On descending the group of halogens, the reactivity of the elements _______________ . [5] (b) Sodium and potassium are both in Group I of the Periodic Table. (i) What name is given to the Group I elements? ___________________________________________________ [1] (ii) Name another element found in Group I. ___________________________________________________ [1] (iii) Which element in Group I is least reactive? ___________________________________________________ [1] (iv) In terms of electronic configuration, what do the elements of Group I have in common? Illustrate your answer giving the full electronic configuration of sodium and potassium. Electronic configuration of sodium: _________________________ Electronic configuration of potassium: _______________________ ______________________________________________________ ___________________________________________________ [3] G142F6 879 2 [Turn over (c) Sodium reacts with fluorine to form sodium fluoride. Examiner Only Marks Remark (i) What is the formula of sodium fluoride? ___________________________________________________ [1] (ii) State the type of bonding in sodium fluoride. ___________________________________________________ [1] (d) Use your knowledge of the Periodic Table to answer the following questions. (i) Give the symbol of a noble gas. ___________________________________________________ [1] (ii) Give the symbol of an element which has five electrons in its outer shell. ___________________________________________________ [1] (iii) Give the symbol of a non-metal which is solid at room temperature and pressure. ___________________________________________________ [1] (iv) Give the symbol of an element which forms an ion with a charge of 2+. ___________________________________________________ [1] G142F6 879 3 [Turn over 2 (a) Sugar is soluble in water. It has a high solubility. Examiner Only Marks Remark (i) What is meant by the term solubility? ______________________________________________________ ______________________________________________________ ______________________________________________________ ___________________________________________________ [4] (ii) When you add sugar to water and stir, the sugar dissolves. Explain in terms of particles what has happened to the sugar. ______________________________________________________ ______________________________________________________ ___________________________________________________ [2] (iii) How does the solubility of sugar vary as temperature increases? ___________________________________________________ [1] (iv) What name is given to a solution that cannot dissolve any more sugar at a given temperature? ___________________________________________________ [1] (b) Use your Data Leaflet to answer the following questions. (i) Name a soluble metal sulphate. ___________________________________________________ [1] (ii) Name an insoluble metal sulphate. ___________________________________________________ [1] G142F6 879 4 [Turn over (c) Complete the following table giving the solute and solvent in each of the solutions. Solution Solute Examiner Only Marks Remark Solvent Seawater Cola drink [4] (d) When a fish is caught in a river and put into a jar of water, it survives for a long time if the jar is kept cool. However, if the water in the jar is allowed to warm up, the fish soon dies. Explain why this happens. _________________________________________________________ _________________________________________________________ _________________________________________________________ ______________________________________________________ [3] Quality of written communication [2] (e) Some football boots and leather bags have a small packet of silica gel included in the packaging. (i) What is the purpose of the silica gel? ______________________________________________________ ___________________________________________________ [1] (ii) Name another solid compound used in the laboratory for the same purpose as the silica gel. ___________________________________________________ [1] G142F6 879 5 [Turn over 3 The table below gives the only gases present in a particular sample of dry air. Name of gas Examiner Only Marks Remark Percentage by volume (%) Formula of gas Argon Carbon dioxide Nitrogen 0.03 78.000 11 N2 Oxygen 21.000 11 (a) Complete the blank spaces in the table above. [4] (b) Use only the gases from the table above to answer the following questions. (i) Which gas is used for respiration? _______________________ [1] (ii) Which gas is the least reactive?__________________________ [1] (iii) Which gas is used in fire extinguishers? ___________________ [1] (iv) Which gas is there most of in air? ________________________ [1] (v) Which gas is used inside crisp bags?______________________ [1] (c) Oxygen can be made by the decomposition of hydrogen peroxide using manganese(IV) oxide (manganese dioxide). (i) Complete the table below. Substance Physical state at room temperature Colour Hydrogen peroxide Manganese(IV) oxide [4] (ii) What is the purpose of the manganese(IV) oxide? ___________________________________________________ [1] G142F6 879 6 [Turn over (iii) Draw a labelled diagram of the assembled apparatus used to prepare a gas jar of oxygen in the laboratory. Examiner Only Marks Remark [5] (iv) Describe the test for oxygen gas and the result you would expect. ______________________________________________________ ___________________________________________________ [2] G142F6 879 7 [Turn over 4 (a) The following reactions A, B and C can be classified in different ways. Examiner Only Marks A calcium carbonate calcium oxide + carbon dioxide B sodium hydroxide + sulphuric acid sodium sulphate + water C Remark zinc + copper(II) sulphate zinc sulphate + copper (i) Complete the table by placing a tick ( ) in each column for reactions A, B and C indicating which terms apply to each reaction. More than one term can apply to each reaction. Term Reaction B A C Exothermic Endothermic Thermal decomposition Displacement Combustion Neutralisation [6] (ii) Write balanced symbol equations for reactions A, B and C. A ________________________________________________ [2] B ________________________________________________ [3] C _________________________________________________ [2] (iii) What would you observe during reaction C? ______________________________________________________ ______________________________________________________ ______________________________________________________ ___________________________________________________ [4] G142F6 879 8 [Turn over (b) Solid copper(II) oxide can be reduced by passing a stream of hydrogen gas over the heated solid. Examiner Only Marks Remark Glass tube Excess hydrogen burning Hydrogen gas HEAT Porcelain boat containing copper(II) oxide (i) Write a balanced symbol equation for the reaction between copper(II) oxide and hydrogen gas. ___________________________________________________ [2] (ii) What would you observe during this reaction? ______________________________________________________ ______________________________________________________ ___________________________________________________ [2] (iii) Write a balanced symbol equation for the hydrogen burning. ___________________________________________________ [3] G142F6 879 9 [Turn over 5 (a) Complete the passage below about electrolysis by filling in the gaps. Examiner Only Marks Remark Electrolysis is the process of _______________ substances by passing an electric current through them. The electric current enters and leaves the substance through electrodes. The names given to the two electrodes are the _______________ and the _______________. [3] (b) Ionic compounds, such as lead(II) bromide, conduct electricity when molten or dissolved in water. (i) Explain as fully as possible why ionic compounds conduct electricity when they are molten. ______________________________________________________ ______________________________________________________ ___________________________________________________ [2] (ii) Draw a labelled diagram of the assembled apparatus used to carry out the electrolysis of molten lead(II) bromide. [5] G142F6 879 10 [Turn over (iii) Name the material used to make the electrodes in this electrolysis. Examiner Only Marks Remark ___________________________________________________ [1] (iv) What would be observed at the positive electrode during the experiment? ______________________________________________________ ___________________________________________________ [2] (v) Name the products of this electrolysis. ______________________________________________________ ___________________________________________________ [2] (vi) Why does this electrolysis experiment need to be carried out in a fume cupboard? ______________________________________________________ ___________________________________________________ [2] G142F6 879 11 [Turn over 6 (a) Lithium has a relative atomic mass of 7. Relative atomic masses are measured relative to the mass of one particular atom. Examiner Only Marks Remark Give the name and mass number of the atom which is used as a standard by which the mass of lithium and all other atoms are measured. ______________________________________________________ [2] (b) The diagram below shows an atom of lithium. + + + A (i) What is represented by A? ___________________________________________________ [1] (ii) Write the electronic configuration of the atom of lithium. ___________________________________________________ [1] (iii) Explain why an atom of lithium is electrically neutral. ______________________________________________________ ______________________________________________________ ___________________________________________________ [2] G142F6 879 12 [Turn over (c) Lithium forms a variety of compounds. Complete the table below giving the names of the compounds and calculate the relative formula mass of each compound. You may find your Data Leaflet useful in answering this question. Compound Name Examiner Only Marks Remark Relative Formula Mass LiCl LiOH Li2CO3 Li3PO4 [8] (d) Lithium reacts with non-metals to form compounds. The unbalanced equations below show the reactions of lithium with bromine and oxygen. Balance the equations. (i) Li + Br2 LiBr [1] (ii) Li + O2 Li2O [1] (e) An unknown metal, M, reacts with oxygen to form an oxide with formula M2O3. The relative formula mass of M2O3 is 160. (i) Calculate the mass of the three oxygen atoms in M2O3. ___________________________________________________ [1] (ii) Using the relative formula mass of M2O3, calculate the mass of the two atoms of M in M2O3. __________________________________________________ [1] G142F6 879 13 [Turn over (iii) Calculate the mass of one atom of M. Examiner Only Marks ___________________________________________________ [1] (iv) Identify metal M. (You may find your Data Leaflet useful in answering this question.) ___________________________________________________ [1] THIS IS THE END OF THE QUESTION PAPER G142F6 879 14 Remark [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. S 6/06 900 302507(34)

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