2016 C1 Promotional Exam Paper 1

This question booklet consists of 8 printed pages. HWA CHONG INSTITUTION C1 Promotional Examination Higher 2 CANDIDATE NAME CT GROUP 16S CHEMISTRY Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet Data Booklet. 9729/01 30 September 2016 40 min READ THESE INSTRUCTIONS FIRST Write in soft pencil. Complete the information on the Multiple Choice Answer Sheet as shown below. There are twenty questions on this paper. Answer all questions. For each question, there are four possible answers A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the Multiple Choice Answer Sheet. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. The use of an approved scientific calculator is expected, where appropriate. Write your name Write and shade your NRIC or FIN number Write your CT group

2 2016 HCI C1 H2 Chemistry Promotional Exam / Paper 1 SECTION A 1 The first ionization energies of five consecutive elements in the Periodic Table with proton number less than 20 are shown in the diagram. The sketches below represent two other properties of the same elements. What are properties X and Y? property X property Y A Electronegativity Atomic radius B Ionic radius Electronegativity C Melting point Atomic radius D Second ionization energy Effective nuclear charge 2 Which one of the following pairs has permanent dipole - permanent dipole interactions between molecules? A CHCl3 CH4 B CCl4 CClF3 C CClF3 CHCl3 D C2H5Cl C2Cl4 proton number 1st I.E proton number Property X proton number Property Y

3 2016 HCI C1 H2 Chemistry Promotional Exam / Paper 1 3 Three substances, X, Y and Z have physical properties as shown. substance melting point / oC boiling point / oC electrical conductivity of solid of liquid X Y Z 801 2852 3550 1413 3600 4827 poor poor good good good not known What could be the identities of X, Y, and Z? X Y Z A NaF BeCl2 Si B NaCl MgO graphite C NaBr CaO SiO2 D NaI Al2O3 diamond 4 Each of the following graphs represents plots for a fixed mass of ideal gas at two different conditions. Which of the following graphs is correct? A lower T higher T B lower P higher P C lower T higher T D lower T higher T 5 In a redox experiment, 20.0 cm3 of 0.125 mol dm–3 KIO4 was used to oxidize 25 cm3 of 0.8 mol dm–3 K2MnO