2025 AMKSS EOY 3E SCI CHEM P1

9 AMKSS 3E EOY Exam 5086/01/2025 [Turn over ANG MO KIO SECONDARY SCHOOL END-OF-YEAR EXAMINATION 2025 SECONDARY THREE EXPRESS SCIENCE (PHYSICS, CHEMISTRY) 5086/01 Paper 1 Multiple Choice 8 October 2025 1 hour Setter: Mrs Joselyn Luei Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your Name, Class and Index Number at the top of this paper and on the Answer Sheet in the spaces provided. There are forty 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. A copy of the Data Sheet is printed on page 10. A copy of the Periodic Table is printed on page 11. The use of an approved scientific calculator is expected, where appropriate. At the end of the examination, hand in your Answer Sheet and Paper 1 Question Paper separately. This document consists of 11 printed pages and 1 blank page. Candidate Name Form Class Index Number

10 AMKSS 3E EOY Exam 5086/01/2025 21 The diagram below shows two methods of collecting gases. Which row gives the properties of a gas which can be collected by both methods? property 1 property 2 A insoluble in water denser than air B insoluble in water less dense than air C soluble in water denser than air D soluble in water less dense than air 22 The following apparatus are found in a Chemistry laboratory. W X Y Z Which one of the following best matches the apparatus to the purpose of measuring a given volume of liquid? a fixed volume of 25.0 cm3 accurately 28.3 cm3 accurately 25 cm3 A W X Y B X Y Z C X Z Y D Y Z X gas jar measuring cylinder water gas gas 25 cm3

11 AMKSS 3E EOY Exam 5086/01/2025 [Turn over 23 A lab analyst carried out paper chromatography to investigate the presence of banned performance- enhancing drug substances P, Q, R and S in the urine sample of athlete M1. The paper chromatogram of the results are shown below. Which of the following drugs P, Q, R and S did the athlete M1 consume? A P and Q B Q and R C Q and S D R and S 24 In which change of state is heat energy given out and there is a big change in volume? A boiling B condensation C freezing D melting 25 When a test tube containing liquid L is placed in a beaker of boiling water, liquid L immediately starts to boil. What is the boiling point of liquid L? A Between 0°C and room temperature. B Below room temperature. C Between room temperature and 100°C. D Greater than 100°C. M1 P Q R S

12 AMKSS 3E EOY Exam 5086/01/2025 26 An element Z forms a positive ion with the electronic configuration 2, 8, 8. What is the proton number of element Z? A 16 B 17 C 18 D 20 27 Which of the following shows an isotope of the element 11 5 B? A B C D 5p 6n x x x x x 5p 5n x x x x x 6p 5n x x x x x 6p 5n x x x x x x

13 AMKSS 3E EOY Exam 5086/01/2025 [Turn over 28 Which of the following statements about a covalent bond are correct? I. It can be formed between metal and non-metal atoms. II. It can be formed between non-metal atoms. III. It involves the sharing of electrons. IV. It involves the transfer of electrons. A I and III B I and IV C II and III D II and IV 29 A is an element belonging to Group 1 and B is an element belonging to Group 16. What is the formula of the compound formed by A and B? A A2B B AB2 C A2B3 D AB3 30 The diagrams represent different arrangements of atoms. Which diagram represents an alloy? A B C D

14 AMKSS 3E EOY Exam 5086/01/2025 31 How does a calcium atom form a bond with an oxygen atom? A By sharing two pairs of electrons, both of which come from the oxygen atom. B By sharing two pairs of electrons, both of which come from the calcium atom. C By transferring two electrons from the oxygen atom to the calcium atom. D By transferring two electrons from the calcium atom to the oxygen atom. 32 The diagram shows how atoms that make up the compound XY 2 share their valence electrons. Which statement is correct? A X is likely to be calcium. B X is likely to be carbon. C X is likely to be hydrogen. D X is likely to be sulfur. 33 Metal X forms a compound X2SO4. The chloride of metal X would have the chemical formula A XCl B XCl2 C X2Cl D X2Cl3 X Y Y X X

15 AMKSS 3E EOY Exam 5086/01/2025 [Turn over 34 A chemical equation is shown below. x N2 + y H2 → z NH3 Which numbers will correctly balance this chemical equation? x y z A 1 2 2 B 1 3 2 C 2 1 2 D 2 1 4 35 The tables show the pH ranges of two indicators, methyl orange and methyl red. methyl orange red yellow pH 2 3 4 5 6 7 8 methyl red red yellow pH 2 3 4 5 6 7 8 The table below shows the pH of four solutions. solution W X Y Z pH 2.0 3.0 4.0 6.0 Which solution will have both indicators show yellow? A W only B W and X only C X and Y only D Z only 36 Which ionic equation represents the reaction between dilute sulfuric acid and aqueous sodium hydroxide? A H2+ (aq) + O2- (aq) → H2O (l) B H+ (aq) + OH- (aq) → H2O (l) C 2Na+ (aq) + SO42- (aq) → Na2SO4 (aq) D H2SO4 (aq) + 2NaOH (aq) → Na2SO4 + 2H2O (l)

16 AMKSS 3E EOY Exam 5086/01/2025 37 Which statement best describes the difference between ethanoic acid and dilute hydrochloric acid? A hydrogen gas is given out when magnesium metal reacts with dilute hydrochloric acid but not with ethanoic acid B carbon dioxide gas is given out when sodium carbonate reacts with dilute hydrochloric acid but not with ethanoic acid C moist blue litmus paper turns red in dilute hydrochloric acid but remains blue in ethanoic acid D Universal indicator turns red in dilute hydrochloric acid but orange in ethanoic acid 38 Magnesium reacts with excess oxygen according to the following equation: 2Mg + O2 → 2MgO What volume of oxygen is needed to combine with 1.2 g of magnesium? A 14.4 dm3 B 1.2 dm3 C 0.6 dm3 D 0.3 dm3 39 10 cm3 of nitrogen monoxide are reacted with 10 cm3 of oxygen. The equation for the reaction is 2NO (g) + O2 (g) → 2NO2 (g) What is the volume of gas present at the end of the reaction? (All volumes are measured at room temperature and pressure.) A 10 cm3 B 15 cm3 C 20 cm3 D 30 cm3

17 AMKSS 3E EOY Exam 5086/01/2025 [Turn over 40 Which one of the following has the same mass as one mole of liquid H2O? A 24 dm3 of water B one molecule of water C one mole of steam D two moles of H2 plus one mole of O2 END OF PAPER

18 AMKSS 3E EOY Exam 5086/01/2025 Group 1 2 13 14 15 16 17 18 Key 1 H hydrogen 1 2 He helium 4 3 Li lithium 7 4 Be beryllium 9 proton (atomic) number atomic symbol name relative atomic mass 5 B boron 11 6 C carbon 12 7 N nitrogen 14 8 O oxygen 16 9 F fluorine 19 10 Ne neon 20 11 Na sodium 23 12 Mg magnesium 24 3 4 5 6 7 8 9 10 11 12 13 Al al