Broadrick Prelim P2

1 6092/2/8/24 Name Class Index Number BROADRICK SECONDARY SCHOOL SECONDARY 4 EXPRESS PRELIMINARY EXAMINATION 2024 CHEMISTRY Paper 2 Candidates answer on Question Paper No Additional Materials are required. 6092/02 August 2024 1 hour 45 minutes READ THESE INSTRUCTIONS FIRST Write your name, class and index number on all the work you hand in. Write in dark blue or black pen on both sides of the paper. You may use a pencil for any diagrams or graphs, tables or rough working. Do not use staples, paper clips, highlighters, glue or correction fluid. Section A [70 marks] Answer all questions in the spaces provided. Section B [10 marks] Answer one question from this section. Write your answers in the spaces provided on the question paper. The number of marks is given in brackets [ ] at the end of each question or part question. A copy of the Periodic Table is printed on page 23. The use of an approved scientific calculator is expected, where appropriate. FOR EXAMINER’S USE Section A / 70 Section B / 10 Total / 80 This document consists of 23 printed pages including this page

2 [Turn Over 6092/2/8/24 Section A Answer all questions. 1 Choose from the following compounds to answer the questions. Each compound may be used once, more than once or not at all. For Examiner’s Use (a) State which compound: (i) reacts with hydrogen gas at 150 oC, in the presence of nickel catalyst …………………………… [1] (ii) can be oxidised to form propanoic acid …………………………… [1] (iii) is an isomer of butane …………………………… [1] (iv) is an unsaturated hydrocarbon. …………………………… [1] (b) Identify the two compounds that will turn moist blue litmus red. …………………………… and …………………………… [1] [Total: 5]

3 [Turn Over 6092/2/8/24 2 (a) The table shows information on five different particles. particle number of protons number of electrons number of neutrons P 19 19 20 Q 19 19 19 R 9 10 10 S 9 9 9 T 8 10 10 For Examiner’s Use (i) Explain why particle T is an ion. ……………………………………………………………..…………………………………... [1] (ii) Identify the two particles that are isotopes. ………………………… and ………………………… [1] (b) A sample of Krypton was found during a space mission. Experiments were conducted on the sample and the following information was obtained. relative isotopic mass percentage abundance 80 2 82 12 83 12 84 57 85 17 Calculate the relative atomic mass of the sample of Krypton and give your answer to three significant figures. relative atomic mass = …………………… [1] [Total: 3]

4 [Turn Over 6092/2/8/24 3 The table below shows the physical properties of four substances. substance melting point / oC boililng point / oC electrical conductivity phosphorus trichloride -94 76 poor diamond 3550 4830 poor ca