2023 ACJC H2 Chem Prelim Paper 1 QP

1 © ACJC 2023 9729/01/Prelim/2023 [Turn over Anglo-Chinese Junior College JC2 Preliminary Examination Higher 2 CHEMISTRY Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet Data Booklet 9729/01 13 September 2023 1 hour READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name and index number on the Answer Sheet in the spaces provided unless this has been done for you. 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 this booklet. The use of an approved scientific calculator is expected, where appropriate. This document consists of 16 printed pages.

2 © ACJC 2023 9729/01/Prelim/2023 [Turn over 1 Which types of chemical bonds listed below are present in solid ammonium nitrate? 1 ionic bonds 2 dative bonds 3 hydrogen bonds A 1 only B 1 and 2 only C 1 and 3 only D 1, 2 and 3 2 1.00 mol of gaseous molecules A take up a volume of 50 dm 3 at a pressure of 2 bar and a temperature of 50 oC. Which statements explain the above observation? 1 Gaseous molecules of A are in constant rapid random motion. 2 Gaseous molecules of A have significant molecular volume. 3 Gaseous molecules of A experience strong intermolecular forces of attraction. A 1 only B 1 and 2 only C 2 and 3 only D 1, 2 and 3 3 Two properties relating to silicon and sulfur which are non–metallic elements and their atoms are as follows. • property 1 – the oxide forms a strong acid in water • property 2 – no paired 3p electrons Which properties do silicon and sulfur have? silicon sulfur A 1 and 2 1 only B 1 and 2 1 and 2 C 2 only 1 only D 2 only 1 and 2

3 © ACJC 2023 9729/01/Prelim/2023 [Turn over 4 The Group 2 metals have higher melting points than the Group 1 metals. Which factors could contribute towards the higher melting points? 1 There are smaller interatomic distances in the metallic lattices of the Group 2 metals. 2 Two valence electrons from each Group 2 metal atom are available for bonding in the metallic lattice. 3 Group 2 metals have the higher first ionisation energy. A 1, 2 and 3 B 1 and 2 only C 2 and 3 only D 1 only 5 Which statement about the trend in the property of the halogens down the group is correct? A The electronegativity increases. B The reactivity as oxidising agents increases. C The enthalpy change of reaction with hydrogen becomes more endothermic. D The volatility increases. 6 Group 1 and Group 2 ionic hydrides