2025 H2 Chem Prelim P1 QP_VJC

© VJC 2025 9729/01/PRELIM/25 [Turn over VICTORIA JUNIOR COLLEGE JC 2 PRELIMINARY EXAMINATION Higher 2 CHEMISTRY 9729/01 Paper 1 Multiple Choice 19 September 2025 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, CT group and VJC index number on the Answer Sheet. 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. This document consists of 12 printed pages

2 © VJC 2025 9729/01/PRELIM/25 For each question there are four possible answers, A, B, C, and D. Choose the one you consider to be correct. 1 Use of the Data Booklet is relevant to this question. Berkelium, Bk, and Fermium, Fm, are both actinoids. An isotope of Bk2+ and an isotope of Fm3+ have 249 and 252 nucleons respectively. Which row of the table is correct? ion containing larger number of neutrons ion containing larger number of electrons A Bk2+ Fm3+ B both the same Fm3+ C Fm3+ Bk2+ D both the same Bk2+ 2 Consider the atoms of the Period 3 elements from Na to Ar. What is the total number of paired electrons in the valence shells of these eight elements? A 26 B 28 C 30 D 32 3 The boiling points of HF, HCl and HBr are different. HCl has the lowest boiling point. Which statements are correct? 1 HCl has a lower boiling point than HBr because HC l molecules have weaker permanent dipole-permanent dipole forces of attraction. 2 HF molecules experience weaker temporary dipole -induced dipole forces of attraction than HBr molecules. 3 HF molecules experience stronger permanent dipole-permanent dipole forces of attraction than HCl molecules. A 1, 2 and 3 B 1 and 2 only C 2 and 3 only D 3 only

3 © VJC 2025 9729/01/PRELIM/25 [Turn over 4 The diagram shows the structure of a pyruvic acid. pyruvic acid What set of bond angles are present in pyruvic acid? A 180o, 120o, 90o B 180o, 120o, 109o C 120o, 105o, 90o D 120o, 109o, 105o 5 Which statement applies to both ideal and real gases? A Collisions between molecules are elastic. B Molecules are in constant random motion.