2022 HCI Prelim P1 Question Paper

This document consists of 13 printed pages. HWA CHONG INSTITUTION C2 Preliminary Examinations Higher 2 CANDIDATE NAME CT GROUP 21S CENTRE NUMBER INDEX NUMBER CHEMISTRY Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet Data Booklet 9729/01 19 September 2022 1 hour READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Complete the information on the Answer Sheet as shown below. 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 booklet. The use of an approved scientific calculator is expected, where appropriate.

2 © Hwa Chong Institution 2022 9729/01/C2 Preliminary Exam [Turn over 1 Which formula represents a particle wi th the composition of 1 proton, 2 neutrons and 3 electrons? (D represents deuterium, 2H; and T represents tritium, 3H) A H− B D2− C T2− D He− 2 The variation in the second ionisation energy of six consecutive elements in the Periodic Table is shown in the graph. Which element is a Group 13 element? proton number 3 Which observation cannot be explained by intermolecular hydrogen bonding? A Methanol dissolves readily in water. B The boiling point of HBr is higher than that of HCl. C The boiling point of 4-aminophenol is higher than that of 2-aminophenol. D The relative molecular mass of ethanoic acid when dissolved in hexane is 120. 4 In which pairs of compounds does the first molecule have a smaller bond angle than that in the second molecule? 1 NF3 CCl4 2 H2O XeF4 3 SF6 CS2 A 1, 2 and 3 B 1 and 2 only C 2 and 3 only D 1 and 3 only 2nd ionisation energy / kJ mol−1 B C D A

3 © Hwa Chong Institution 2022 9729/01/C2 Preliminary Exam [Turn over 5 The following graphs were obtained for three gases for the variation of pV with p, where p is the pressure and V is the volume of the gas. Which row is correct if gas X is HCl at 300 K? gas Y temperature / K A HCl 400 B CH4 400 C O2 300 D HF 300 6 Methyl red (C15H15N3O2) is an organic compound used as an acid-base indicator. Why does methyl red, which is red in acidic solutions, turn yellow in alkaline solutions? A It is oxidised by OH− ions. B It is reduced by OH− ions. C It forms a cation by gain of H+ ions. D It forms an anion by loss of H+ ions. pV p Ideal gas Gas X Gas Y

4 © Hwa Chong Institution 2022 9729/01/C2 Preliminary Exam [Turn ov