ASRJC 2026 Prelim P1 QP

ASRJC JC2 PRELIM 2026 9476/01/H2 [Turn over ANDERSON SERANGOON JUNIOR COLLEGE 2026 JC2 PRELIMINARY EXAMINATION NAME:______________________________ ( ) CLASS: 26 /____ CHEMISTRY 9476/01 Paper 1 Multiple Choice 1 September 2026 1 hour You must answer on the multiple choice answer sheet. You will need: Multiple choice answer sheet Soft clean eraser Soft pencil Data booklet 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, class and Student Number (ID) on the multiple choice answer sheet. • Completely shade the corresponding circles for the digit or letter in each column for your Student Number (ID). • Do not use correction fluid or tape. • 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. This document has 16 printed pages. Any blank pages are indicated. Multiple Choice Answer Sheet Write your name, class and Student Number (ID). Shade Student Number (ID). Subject Code/Paper No: 9476/01 Subject Title: H2 Chemistry

2 ASRJC JC2 PRELIM 2026 9476/01/H2 1 The following statements are made by a student about an atom with atomic number 31. Which statements are correct? 1 There are a total of 8 electrons in the s orbitals. 2 There is 1 occupied dumbbell-shaped orbital in the outermost shell. 3 The d electrons have the same principal quantum number as the outermost p electrons. A 1, 2 and 3 B 1 and 2 only C 2 and 3 only D 1 only 2 Nuclear Magnetic Resonance (NMR) techniques can be used to detect atomic nuclei that have an odd number of protons or an odd number of neutrons. For which element may both isotopes be detected by NMR techniques? A 28Si and 29Si B 16O and 18O C 12C and 13C D 7Be and 9Be 3 The element tin exists in two forms, grey tin and white tin. Some properties of grey tin and white tin are shown. grey tin white tin boiling point / K 2543 2533 electrical conductivity none in solid or liquid good in solid and liquid malleability brittle malleable Which structural change might take place when grey tin changes to white tin? A giant covalent to giant ionic B giant covalent to giant metallic C giant ionic to giant covalent D giant ionic to giant metallic

3 ASRJC JC2 PRELIM 2026 9476/01/H2 [Turn over 4 Which changes occur when ethoxyethane, (CH 3CH2)2O, reacts with boron trichloride, BC l3, to form (CH3CH2)2OBCl3? 1 The Cl−B−Cl bond angle in boron trichloride decreases. 2 The boron atom accepts a pair of electrons from oxygen. 3 The C−O−C bond angle in ethoxyethane decreases. A 1, 2 and 3 B 1 and 2 only C 2 and 3 only D 1 only 5 Which pair of molecules have a greater permanent dipole in molecule I than in molecule II? I II A CCl4 CH2Cl2 B CO Cl Cl CO CH3 CH3 C C C Cl H3C CH3 Cl C C Cl H3C Cl CH3 D C C F F CH3 CH3 C C F H3C CH3 F 6 A given mass of ideal gas occupies a volume V and exerts a pressure p at 37 °C. At which temperature will the same mass of the ideal gas occupy the volume 0.5V and exert a pressure 3p? A 55.5 °C B 55.5 K C 465 °C D 465 K

4 ASRJC JC2 PRELIM 2026 9476/01/H2 7 Use of the Data Booklet is relevant to this question. Which graph correctly describes the behaviour of equal masses of N 2 and Ne? The gases behave as ideal gases under the conditions chosen. A B C D

5 ASRJC JC2 PRELIM 2026 9476/01/H2 [Turn over 8 Use of the Data Booklet is relevant to the question. Which graph shows the correct trend of the physical properties of Period 3 elements? A B C D 9 Use of Data Booklet is relevant to this question. What is the correct order of the lattice energies of CoF2, CoO and CoI2, starting with the highest numerical value? A CoI2 > CoF2 > CoO B CoF2 > CoO > CoI2 C CoO > CoF2 > CoI2 D CoO > CoI2 > CoF2

6 ASRJC JC2 PRELIM 2026 9476/01/H2 10 An Ellingham diagram is a graph of ∆G against temperature, T. SO2(g) + ½O2(g) SO3(g) ∆H < 0 Given that ∆G = ∆ H − T∆S, which Ellingham diagram correctly corresponds to the reaction above? A B C D T / K ∆G 0 T / K ∆G 0 T / K ∆G 0 T / K ∆G 0

7 ASRJC JC2 PRELIM 2026 9476/01/H2 [Turn over 11 Nitrogen dioxide, NO2, is a pollutant. It is produced when nitrogen monoxide, NO is oxidised. 2NO(g) + O2(g) 2NO2(g) The following data are obtained from an initial rates study into the kinetics of the reaction. experiment initial [NO] / mol dm−3 initial [O2] / mol dm−3 initial rate / mol dm−3 min−1 1 0.80 0.80 0.020 2 0.80 0.32 0.0080 3 1.6 0.96 0.096 What are the units of the rate constant for this reaction? A min−1 B mol−1 dm3 min−1 C mol−2 dm6 min−1 D mol dm−3 min−1 12 Lead is the final product formed by a series of changes in which the rate –determining stage is the radioactive decay of uranium–238. This decay is a first–order reaction with a rate constant of 1.54 × 10−9 year−1. What would be the age in years of a rock sample originally lead –free, in which molar ratio of uranium to lead is now 0.0667? A 1.76 × 109 B 1.80 × 109 C 2.54 × 109 D 2.60 × 109 13 The statements refer to the following equilibrium. CO(g) + 3H2(g) CH4(g) + H2O(g) H < 0 Which statement is correct? A Increasing the pressure increases the value of Kp for the reaction. B Increasing the temperature increases the value of Kp for the reaction. C Adding an inert gas at constant pressure and temperature shifts the position of equilibrium to the left. D Adding a catalyst increases the rate constant of the forward reaction and has no effect on the rate constant of the backward reaction.

8 ASRJC JC2 PRELIM 2026 9476/01/H2 14 The concentration of a saturated solution of lead(II) chromate, PbCrO4, is 1.3 × 10−7 mol dm−3. What is the value of the solubility product of PbCrO4? A 1.7 × 10−14 B 6.8 × 10−14 C 1.3 × 10−7 D 2.6 × 10−7 15 The graphs X and Y show the pH changes for two acid-base titrations. Which indicator could be used in the titration that produces curve Y but not in the titration that produces curve X? indicator pH range A thymol blue (acid) 1.2 – 2.8 B bromocresol green 3.8 – 5.4 C thymol blue (base) 8.0 – 9.6 D alizarin yellow 10.1 – 13.0

9 ASRJC JC2 PRELIM 2026 9476/01/H2 [Turn over 16 In which of the following reactions is ammonia acting either as a Brønsted-Lowry base or a Lewis base? 1 NH3 + HNO2 warm N2 + 2H2O 2 NH3 + NaH NaNH2 + H2−33 oC 3 NH3 + H2O NH4+ + OH− 4 NH3 + COCl COCl C C O O NH + 2 HCl warm A 1 and 2 B 3 and 4 C 2 and 3 D 2 and 4 17 Which row correctly describes one molecule of 3-ethynylcyclopentene. total number of unhybridised p orbitals total number of sp3 orbitals A 4 3 B 4 12 C 6 3 D 6 12

10 ASRJC JC2 PRELIM 2026 9476/01/H2 18 Which molecules rotate plane polarised light? 1 Br Br 2 OH OH 3 Br Br A 1, 2 and 3 B 1 and 2 C 2 and 3 D 1 only 19 Use of the Data Booklet is relevant to this question. The reaction of propane with a halogen