ACJC 2026 Prelim P1 QP

This document consists of 15 printed pages and 1 blank page. Anglo-Chinese Junior College JC2 Chemistry Preliminary Examinations Higher 2 CANDIDATE NAME FORM CLASS INDEX NUMBER SUBJECT TUTOR CHEMISTRY Paper 1 Multiple Choice You must answer on the multiple choice answer sheet. You will need: Multiple choice answer sheet Data Booklet Soft clean eraser Soft pencil (type B or HB is recommended) 9476/01 16 September 2026 1 hour INSTRUCTIONS • 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 multiple choice answer sheet. • Follow the instructions on the multiple choice answer sheet. • Write in soft pencil. • Write your name, centre number and index number on the multiple choice answer sheet in the spaces provided unless this has been done for you. • Do not use correction fluid or tape. • Do not write on any bar codes. • You may use an approved calculator. INFORMATION • The total mark for this paper is 30. • Each correct answer will score one mark. • Any rough working should be done on this question paper.

2 ACJC2026 9476/JC2 Preliminary Examination/2026 [Turn over 1 Iron(II) ethanedioate can be oxidised by manganate( VII) ions using the sequence of reactions shown. MnO4‒ + 8H+ + 5e‒ → Mn2+ + 4H2O Fe2+ → Fe3+ + e‒ C2O42‒ → 2CO2 + 2e‒ What volume of 0.01 mol dm‒3 KMnO4 is required to oxidise 15 cm 3 of an acidified solution of 0.01 mol dm‒3 FeC2O4? A 6 cm3 B 9 cm3 C 15 cm3 D 25 cm3 2 An organic compound E contains only carbon, hydrogen, and oxygen. Complete combustion of 1.50 g of E in excess oxygen produces 2.20 g of carbon dioxide gas and 0.90 g of liquid water. What is the empirical formula of E? A CH2O B C2H4O C CHO D C2H2O 3 Use of the data booklet is relevant to this question. Which ion has the largest angle of deflection in an electric field? A S2− B Br− C F− D O2− 4 The successive ionisation energies (IE) of two elements, M and N, are shown. IE / kJ mol–1 1st 2nd 3rd 4th 5th 6th 7th 8th M 550 1065 4138 5500 6910 8760 10230 11800 N 1140 2103 3470 4560 5760 8550 9940 18600 What is the likely compound formed between M and N? A MN B MN2 C M2N D M3N2

3 ACJC2026 9476/JC2 Preliminary Examination/2026 [Turn over 5 Which statement best describes a metallic bond? A It is the electrostatic attraction between valence electrons and positive nuclei. B It is the electrostatic attraction between delocalised electrons and positive ions. C It is the electrostatic attraction between valence electrons and positive ions. D It is the electrostatic attraction between delocalised electrons and positive nuclei. 6 Which statement is a basic assumption of the kinetic theory of gases as applied to an ideal gas? A The intermolecular forces of attraction between gas molecules are negligible under all conditions of temperature and pressure. B Gas molecules are in continuous, random motion, and all collisions between molecules are inelastic. C The volume of gas is insignificant compared to the volume of the gas molecules. D The average kinetic energy of the gas molecules is directly proportional to the temperature in degrees Celsius (°C). 7 For the oxides of Period 3 elements, which property decreases from Na2O to P4O10? A covalent character B melting point C pH when mixed with water D solubility in aqueous alkali

4 ACJC2026 9476/JC2 Preliminary Examination/2026 [Turn over 8 Three charts show the variation of three physical properties for the Period 3 elements. Which row is correct? physical property 1 physical property 2 physical property 3 A ionic radius electrical conductivity melting point B electrical conductivity melting point ionic radius C melting point ionic radius electrical conductivity D melting point electrical conductivity ionic radius physical property 2 Na Mg Al Si P S Cl physical property 1 Na Mg Al Si P S Cl physical property 3 Na Mg Al Si P S Cl

5 ACJC2026 9476/JC2 Preliminary Examination/2026 [Turn over 9 Radium is the last element in Group 2 in the Periodic Table. Which statement is not true for radium? A It is the least reactive element in Group 2. B It reacts with water to release hydrogen gas. C It forms a basic oxide. D Its carbonate has the highest thermal stability in Group 2. 10 The table below shows the bond energies and bond lengths of several carbon-halogen bonds. bond bond energy /kJ mol–1 bond length / nm C – F 485 0.138 C – Cl 340 0.177 C – Br 280 0.193 C – I 240 0.214 Based on these data and your chemical knowledge, which statements correctly pair the relative reactivity of halogenoalkanes towards nucleophilic substitution with its corresponding chemical explanation? relative reactivity explanation 1 Fluoroalkanes are the least reactive. The smallest atomic radius of fluorine allows for the most highly effective orbital overlap with carbon, resulting in the highest bond energy (485 kJ mol–1) which makes the C – F bond the most difficult to heterolytically cleave. 2 Chloroalkanes are more reactive than bromoalkanes. The shorter C – Cl bond length (0.177nm) reflects the smaller, less polarisable electron cloud of chlorine. This creates less electronic repulsion against the incoming nucleophile, allowing for a faster attack. 3 Iodoalkanes are the least reactive. The low C – I bond energy (240 kJ mol–1) ensures that its nucleophilic substitution releases the greatest amount of net energy, and this highly exothermic nature directly causes the reaction to proceed at the fastest rate. A 1 and 2 only B 2 and 3 only C 1, 2 and 3 only D 1 only

6 ACJC2026 9476/JC2 Preliminary Examination/2026 [Turn over 11 The flowchart shows a series of steps to form separate precipitates V and W. What are V and W? V W A AgBr AgCl B AgCl AgBr C AgBr AgI D AgI AgBr 12 Which chemical equation represents the standard enthalpy change of formation, ∆ Hfθ, of liquid ethanol, CH3CH2OH(l)? A 2C(s) + 3H2(g) + 1 2 O2(g) → CH3CH2OH(l) B 2C(s) + 6H(g) + O(g) → CH3CH2OH(l) C CH3CH2OH(l) + 3O2(g) → 2CO2(g)+ 3H2O(l) D 2C(s) + 2H2(g) + H2O(l) → CH3CH2OH(l) solution containing two halide ions mixture of precipitates precipitate V colourless solution colourless filtrate precipitate W add excess AgNO3(aq), filter to collect the residue add excess dilute NH3 and filter add excess concentrated NH3 add excess dilute HNO3

7 ACJC2026 9476/JC2 Preliminary Examination/2026 [Turn over 13 For a first-order chemical reaction, which statements are incorrect? 1 The rate of reaction is independent of the reactant concentration. 2 The half-life of the reaction is directly proportional to the initial concentration of the reactant. 3 The half -life of the reaction decreases continuously as the reaction proceeds. A 1 and 2 only B 2 and 3 only C 1, 2 and 3 D 1 only 14 NO and H2 reacts as shown in equation 1. Equation 1: 2NO + 2H2 → N2 + 2H2O The reaction is proposed to proceed via the follow