RI H1 Chemistry Paper1-and-2 2018 QP

© Raffles Institution 2018 8873/01/S/18 [Turn Over RAFFLES INSTITUTION 2018 YEAR 6 PRELIMINARY EXAMINATION Higher 1 CHEMISTRY 8873/01 Paper 1 Multiple Choice 24 September 2018 1 hour Additional Materials: Multiple Choice Answer Sheet Data Booklet READ THESE INSTRUCTIONS FIRST Do not open this question booklet until you are told to do so. Write in soft pencil . Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, class and index number in the spaces provided on the Answer Sheet. There are thirty questions in this section. 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 separate Answer Sheet. Read the instructions on the Answer Sheet very carefully. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in the question booklet. This document consists of 15 printed pages.

© Raffles Institution 2018 8873/01/S/18 [Turn Over 2 For each question, there are four possible answers, A , B , C , and D . Choose the one you consider to be correct. 1 Nitroglycerin is an explosive that decomposes to form carbon dioxide, water, nitrogen and oxygen only. nitroglycerin Which row shows the number of moles of the products formed when 4 mol of nitroglycerin decomposes? carbon dioxide water nitrogen oxygen A 8 8 6 6 B 8 8 12 12 C 12 10 6 1 D 12 10 12 2 2 Use of the Data Booklet is relevant to this question. A 10.0 g sample of H 2 S was collected. How many H atoms are in this sample of H 2 S? [ L = Avogadro constant] A ×× 10.0 2 34.1 L C × 2 10.0 34.1 L B × × 34.1 2 10.0 L D ×× 2 10.0 34.1 L 3 Which of the following species would undergo the greatest deflection in an electric field? A 2 H 2 + C 4 He + B 7 Li 2+ D 9 Be 3+

© Raffles Institution 2018 8873/01/S/18 [Turn Over 3 4 The diagram shows the variation of first ionisation energy with proton number for seven elements of consecutive proton numbers between 1 and 20. first ionisation energy proton number Which of the following is element A ? A Mg C S B Si D K 5 The boiling point of hexane is 69 o C while the boiling point of 2-methylpentane is 60 o C. Which statement best explains the higher boiling point of hexane? A Hexane has a higher density as it has better packing. B Hexane has stronger intermolecular permanent dipole-permanent dipole interactions as it is more polar. C Hexane has stronger intermolecular instantaneous dipole-induced dipole interactions as it has a larger surface area. D Hexane has stronger intermolecular instantaneous dipole-induced dipole interactions as it has a larger number of electro