1784f_07 RJC Promos - -1-Raffles Junior College JC1...

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Unformatted text preview: -1-Raffles Junior College JC1 Promotional Examination 2007CHEMISTRY9746Higher 2 Friday 28 September 2007 0800 0840 hrs 40 minutes Paper 1 READ THESE INSTRUCTIONS FIRST. DO NOT open this booklet until you are told to do so. Write your name and civics tutorial group on the multiple choice answer sheetprovided. Attempt allthe questions. INFORMATION FOR CANDIDATES This paper consists of 25multiple-choice questions. For each question, choose the answer you consider to be correct and record your choice with a 2B pencil on the multiple choice answer sheet provided. The Periodic Tableis provided on page 9. You may want to detach page 9 for easy reference. This paper consists of 9printed pages (including the Periodic Table). -2-Section A For each question, there are four possible answers, A, B, C, and D. Choose the oneyou consider to be correct. Indicate your answers on the multiple choice answer sheet provided. 1Chlorine gas reacts with sodium hydroxide in a disproportionation reaction to form sodium chloride and sodium chlorate(V), NaClO3. Based on this reaction, which of the following ratios is correct?amount of chlorine gas :total amount of chloride and chlorate(V) ions A 1 :1 B 1 :2 C 1 :3 D 1:4 2 The equations for three reactions are given below. Cl2+ 2H2O + SO22HCl+ H2SO4Cl2+ H2S 2HCl+ S SO2+ 2H2S 2H2O + 3S What is the correctorder of reducing strength of the three reacting gases as reducing agents? weakeststrongest A Cl2H2SSO2B Cl2SO2H2SC SO2H2SCl2D H2SCl2SO23 For which of the following is the electronic configuration correctlystated? SpeciesElectronic configurationAA transition metal ion, WW: 1s22s22p63s23p63d24s2BA noble gas, XX: 1s22s22p63s23p63d10CA nonmetal, Y, which can form an Y: 1s22s22p63s23p5ion with an oxidation state of 3 D A metal, Z, which can form an ion Z: 1s22s22p63s23p1with an oxidation state of +3 -3-4X and Y are cations. X contains nprotons and has a charge of +2. Y contains (n1) protons and has the same number of electrons as X. What is the formula of the oxide formed by Y? A Y2OB YOCY2O3DYO25Which of the following species has a square planar structure? A C2H4B CH4CBF4DBrF46Which gas is likely to deviate most from ideal gas behaviour? A HClB He CCH4DN27 Which of the following graphs is not correctfor a fixed mass of an ideal gas at constant temperature? A pVB pdensity of gasCppVD1/pV8Consider the enthalpy changes given below. I2(g) + 3Cl2(g) 2ICl3(s) Ho= 214 kJ mol1 I2(s) I2(g) Ho= +38 kJ mol1What is the standard enthalpy change of formation of iodine trichloride, ICl3? A+176 kJ mol1C88 kJ mol1B+138 kJ mol1D214 kJ mol19Which of the following is endothermic?...
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This note was uploaded on 10/12/2010 for the course C 11 taught by Professor Na during the Spring '10 term at Rappahannock Community College.

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1784f_07 RJC Promos - -1-Raffles Junior College JC1...

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