CHIJ St Nicholas Secondary 3 EOY MCQ Paper & Answers

This document consists of 13 printed pages and 1 blank page [Turn over Name: _______________________________ ( ) Class:___________ YEAR THREE INTEGRATED PROGRAMME END-OF-YEAR ASSESSMENT Chemistry Paper 1 30 September 2022 45 mins _____________________________________________________________________ READ THESE INSTRUCTIONS FIRST Write your name, register number and class on the Answer Sheet using a soft pencil. There are 30 questions in 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. Amendments may be done using a soft eraser. 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 Periodic Table is printed on page 2. The use of an approved scientific calculator is expected, where appropriate. For Examiner’s Use Total (30)

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3 Topics Tested: Atomic Structure, Compounds, Elements and Mixtures, Bonding and Structure, Kinetic Particle Theory, Redox, Periodic Table, Mole Concept, Acids and Bases, Preparation of Salts, Qualitative Analysis. 1 Which statement is true? A Ne has more electrons than F-. B F- has more electrons than Na+. C Cu2+ has more electrons than Cu+. D O2- has more electrons than O. 2 The rate of diffusion of gas P (Mr = 32) and gas Q (Mr = 64) was compared at 30 °C and 60 °C. Which would have the slowest rate of diffusion? A gas P at 30 °C B gas P at 60 °C C gas Q at 30 °C D gas Q at 60 °C 3 In which species are the numbers of electrons and neutrons equal? A Beସ ଽ B Fଽ ଵଽ C Naଵଵ ଶଷ + D O଼ ଵ଼2-

4 4 The isotope cobalt-60 (Coଶ଻ ଺଴ ) is used to destroy cancer cells in the human body. Which statements about an atom of cobalt-60 is/are correct? 1 It contains 33 neutrons. 2 Its nucleus has a relative charge of 27+. 3 It has different number of neutrons from the other isotopes of cobalt. A 1 only B 1 and 2 only C 2 and 3 only D 1, 2 and 3 5 Which of the following pairs consists of two pure substances? A diamond and aqueous iodine B hydrogen and bronze C hydrogen chloride and water D lithium and air 6 Which of the following best describes the arrangement of particles present in dilute aqueous ammonia? NH3 molecules OH- ions A Not present Close together B Not present Far apart C Close together Close together D Far apart Far apart

5 7 Study the molecule below: In which group of the Periodic Table are elements W, X, Y and Z likely to be found? W X Y Z A Group III Group V Group VI Group I B Group IV Group III Group VI Group VII C Group III Group V Group II Group I D Group IV Group V Group VI Group VII 8 The compound silicon carbide has the structure as shown: Which property is not correct for this compound? A It is hard. B It is soluble in water. C It has high melting point. D It has poor electrical conductivity.

6 9 Coloured glass, such as those used in church windows, requires three oxides – one macromolecular, one ionic and one of a transition metal. Which combination is likely to produce a coloured glass? A Al2O3, MgO, SnO B P4O10, CaO, CuO C SiO2, CaO, PbO D SiO2, PbO, CoO 10 The diagram below shows the structure of sodium chloride. Which of the following statements is false? A The structure is not able to conduct electricity in any physical states. B Each sodium ion is surrounded by 6 chloride ions. C The ratio of the ions is 1:1. D The structure is held together by strong electrostatic forces of attraction. 11 In which of the following does sulfur exhibit the highest oxidation state? A S8 B SO2 C Na2S2O3 D H2SO4 chloride ion sodium ion key

7 12 Which of the following reactions does hydrogen gas behave as an oxidising agent? A 2Na + H2  NaH B C2H4 + H2  C2H6 C N2 + 3H2  2NH3 D H2 + Cl2  2HCl 13 How many moles of carbon are present in 18 g of glucose, C6H12O6? A 0.1 mole B 0.6 mole C 1.0 mole D 6.0 mole 14 ‘Iron tablets’ can be consumed as a supplement to one’s diet. They contain iron(II) sulfate. The percentage of iron in the tablets can be determined through a titration, where iron(II) is converted to iron(III). Which of the following aqueous reagents could be best used under suitable conditions to carry out the titration? A nitric acid B potassium iodide C potassium manganate(VII) D sodium sulfite 15 Silver nitrate and barium chloride react according to the equation below. 2AgNO3 (aq) + BaCl2 (aq)  2AgCl (s) + Ba(NO3)2 (aq) What is the volume of 0.10 mol/dm3 aqueous silver nitrate that reacts completely with 20 cm3 of 0.20 mol/dm3 of barium chloride? A 10 cm3 B 20 cm3 C 40 cm3 D 80 cm3

8 16 An acyl chloride, C6H5COCl reacts with an alcohol, C6H5OH according to the equation below. C6H5COCl + C6H5OH  C6H5COOC6H5 + HCl What is the percentage yield if 0.8 g of C6H5COOC6H5 was obtained from 1.2 g of the acyl chloride? [Mr of C6H5COCl is 140.5; Mr of C6H5COOC6H5 is 198] A 47.3% B 66.7% C 71.0% D 94.0% 17 Aqueous lead(II) nitrate cannot be used to differentiate A dilute sulfuric acid from dilute hydrochloric acid. B aqueous potassium iodide from aqueous potassium chloride. C aqueous sodium hydroxide from aqueous ammonia. D aqueous sodium carbonate from aqueous sodium nitrate. 18 Which of the following is suitable for the preparation of potassium chloride? A potassium with dilute hydrochloric acid B potassium hydroxide with dilute hydrochloric acid C potassium chloride with dilute sulfuric acid D potassium carbonate with sodium chloride solution 19 A blue solution contains two sulfate salts. When aqueous ammonia is added to the solution, a blue precipitate is formed, which dissolves in excess aqueous ammonia to form a deep blue solution. Which are the two cations in the solution? A Cu2+ and Zn2+ B Cu2+ and Ca2+ C Cu2+ and Pb2+ D Cu2+ and Al3+

9 20 The reaction between CuCO3 and HNO3 is as shown in the equation. CuCO3 + 2HNO3  Cu(NO)3 + CO2 + H2O What would be observed if 18.6 g of CuCO3 is reacted with 0.4 dm3 of 0.5 mol/dm3 HNO3? A Blue solution only. B Colourless solution only. C Blue solution with green solid. D Colourless solution with green solid. 21 Which of the following statements is correct about the elements going from left to right in Period 2 of the Periodic Table? A The metallic properties of the elements increases. B The oxidising ability of the elements increases. C The tendency of the elements to gain electron decreases. D The number of valence electrons decreases. 22 An element Y reacts with oxygen to form two gases with the formulae YO and YO2. YO is neutral to litmus while YO2 reacts with alkalis to form salt and water only. What does this suggest about Element Y? A It is an alkali metal. B It is a non-metal in Group IV. C It is a metal in Group II. D It is a halogen.

10 23 The table shows the pH ranges required by different crops for growth. soil pH 5.0 6.0 7.0 8.0 The graph shows how the pH value of the soil in a farmer’s field changes over time. The farmer wants to grow oats, barley and sugar beet. In which period of time would all three crops grow well? A between T1