2020 EJC JC2 Prelim H2 Chemistry Paper 1 QP

© EJC [Turn Over EUNOIA JUNIOR COLLEGE JC2 Preliminary Examination 2020 General Certificate of Education Advanced Level Higher 2 CHEMISTRY Paper 1 Multiple Choice 9729/01 18 September 2020 1 hour Additional Materials: Multiple Choice Answer Sheet Data Booklet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, civics group and registration number on the Answer Sheet in the spaces provided unless this has been done for you. There are thirty 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 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 this question paper. The use of an approved scientific calculator is expected, where appropriate. This document consists of 11 printed pages and 1 blank page.

2 © EJC 9729/01/J2PE/20 1 Which of the following species will produce the largest deflection when fired with equal velocity into an electric field? A 7Li+ B 9Be2+ C 16O2– D 14N3– 2 Use of the Data Booklet is relevant to this question. Which of the following statements are true? 1 The Cr atom has an empty d-orbital. 2 All the electrons in the d-orbitals of a Mn2+ ion are unpaired. 3 The Fe2+ ion has the same electronic configuration as the Co3+ ion. A 1, 2 and 3 B 1 and 2 C 2 and 3 D 1 only 3 Which of the following contains one polar molecule and one non-polar molecule? A AlCl3, Al2Cl6 B POCl3, PCl3 C HOBr, Br2O D XeF2, XeF6 4 Which of the following statements about Al2O3 are true? 1 It can react with both acids and bases. 2 It has a higher degree of covalent character than Na2O. 3 It has a more exothermic lattice energy as compared to Na2O. A 1, 2 and 3 B 1 and 2 C 2 and 3 D 1 only

3 © EJC 9729/01/J2PE/20 [Turn over 5 Use of the Data Booklet is relevant to this question. The following graph was obtained for a sample of a gas at 500 K. Assuming that the gas behaves ideally under the conditions at which all measurements were made, what is its likely identity? A He B Ne C Ar D Kr 6 Which of the following statements about a 20.3 g sample of Co 2(SO4)3 (Mr = 406) is incorrect? A It contains 1.5 × 1023 ions. B It contains 0.1 mol of Co3+ ions. C It contains 14.5 % of cobalt by mass. D It contains 47.3 % of oxygen by mass. 7 20.0 cm 3 of 0.02 mol dm –3 aqueous sodium bromate( V), NaBrO 3, was found to react completely with 80.0 cm3 of 0.01 mol dm–3 hydroxylamine, NH2OH. The half equation for the reduction of bromate(V) ion is given as shown. 32BrO (aq) + 6H (aq) + 6 Br (aq) + 3H O( )e      l Which of the following could be the nitrogen-containi