SAJC H2 Chem 2013 Prelim P1 QP

1     [Turn Over   ST ANDREW’S JUNIOR COLLEGE JC2 Preliminary Examinations Chemistry Higher 2 9647/01 Paper 1 Multiple Choice 19 September 2013 1 hour Additional Materials: Multiple Choice Answer Sheet, Data Booklet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. There are 40 questions on this paper. Answer all questions. For each question there are four possible answers A, B, C and D. Chose the one you consider correct and record your choice in soft pencil on the separate 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. This document consists of 19 printed pages including this page. 1111

2     [Turn Over   V V PV P P Density Section A For each question there are four possible answers, A, B, C and D. Choose the one you consider to be correct. 1 The metal, M (Ar = 52.8), combines with 1.2 g of oxygen to form the oxide M2O. The metal, M, also forms a second oxide in which the metal and oxygen are present in the ratio 14:1 by mass. What is the molecular formula of the second oxide? A M2O3 B M4O C M11O3 D M7O 2 0.0100 mol of an oxide of an element, L , represented by L 2On is found to react with exactly 8.00 x 10 -3 mol of acidified KMnO 4 solution. In the reaction, aqueous H LO4 2- ion is formed. What is the initial oxidation state of L? A + 1 B + 2 C + 3 D + 4 3 Which of the following diagrams correctly describes the behavior of a fixed mass of an ideal gas at constant T? (T is measured in K.) A C B D 1112

3     [Turn Over   4 With reference to its electronic configuration, which of the following statements is true about the electrons in the atoms of the element with atomic number 29? A The electrons in the outermost principle quantum shell experience inter-electronic repulsion. B The d electrons are in the same principle quantum shell as the outermost s electrons. C There are p electrons in 2 different principle quantum shells. D There are s electrons in 3 different principle quantum shells. 5 The graph shows the logarithm, lg, of the first eight ionisation energies of two elements in Periods 2 and 3. What is the most likely compound that will be formed between the two elements? A CO 2 B SiO2 C CS2 D SiCl4 6 Covalent bonds are formed by orbital overlap. Which of the following is not present in the following molecule?   A sp3-sp2 overlap between C1 and C2 B sp2-sp2 overlap between C2 and C3 C sp3-sp overlap between C3 and C4 D sp-sp overlap between C4 and C5 12345678 lg (ionisation energy) no. of electrons removed 1113

4     [Turn Over   7 Which of the following molecules is planar? A Benzene B SCl6 C Butanone D Cyclohexene 8 Given the following enthalpy changes: Enthalpy change of atomisation