2023 VS Chem Prelims P1

Class Register Number Name 6092/01 CHEMISTRY 23/4P/6092/1 PAPER 1 Tuesday 12 September 2023 1 hour VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA VICTORIA SCHOOL PRELIMINARY EXAMINATION SECONDARY FOUR Additional materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Write your name, class and index number on all the work you hand in. Do not use staples, paper clips, glue or correction fluid. 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 that 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. A copy of Periodic Table is printed on page 15. This question paper consists of 15 printed pages, including the cover page. [Turn Over

2 © Victoria School 23/4P/6092/1 1 Some information on these gas particles are given below. gas helium neon argon relative atomic mass, Ar 4 20 40 average speed / m/s 1.36 x 103 0.70 x 103 0.43 x 103 What is the average speed of the particles of oxygen gas? A 0.39 x 103 m/s B 0.63 x 103 m/s C 1.08 x 103 m/s D 1.47 x 103 m/s 2 Which of the following substances can be condensed when it passes through a water-cooled condenser? melting point / C boiling point / C A B C D -150 -39 2 5 -120 12 15 79 3 The catalytic cracking of nonane (C9H20) produces the following mixture. compound C7H16 C4H8 C2H6 CH4 percentage composition by mass / % 28 47 16 9 Which method can be used to separate the constituents of the mixture? A chromatography B evaporation C fractional distillation D separating funnel

3 © Victoria School 23/4P/6092/1 4 The heating curve of an impure sample of substance X is shown below. What are the melting point and boiling point of pure substance X? melting point / C boiling point / C A B C D 45 47 48 49 129 128 127 130 5 A student needs to measure four different volumes of a solution accurately. The volumes are 10.0 cm3, 25.0 cm3, 50.0 cm3 and 60.0 cm3. The apparatus available includes a 25.0 cm3 pipette. Which volumes could be measured using this pipette? A 10.0 cm3 and 25.0 cm3 B 25.0 cm3 only C 25.0 cm3 and 50.0 cm3 D 50.0 cm3 and 60.0 cm3 6 Which of the following statements about a compound are true? 1 A compound have varied percentage composition by mass of each element. 2 A compound may contain both ionic and covalent bonds. 3 A compound melts at a fixed temperature. A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3 temperature / C time / min 45 48 127 129

4 © Victoria School 23/4P/6092/1 7 Which of the following correctly describes an ion of an isotope of .26 56 Fe? number of electrons number of neutrons number of protons A B C D 23 24 26 28 30 28 30 32 26 26 26 26 8 The electronic configurations of three particles, X, Y and Z are shown below. X 2.8.1 Y 2 Z 2.8.5 Which statement is true for the three particles? A X forms the ionic bonds with Z. B Y must be a noble gas. C Z forms covalent bonds only. D Z forms the ion Z3+. 9 The graph below shows how a property changes for the elements from sulfur to calcium. What is the unknown property y on the y-axis? A the charge of the ion formed by the element B the number of neutrons in an atom C the number of valence electron in an atom D the sum of protons and neutrons in an atom y element S Ca Cl Ar K

5 © Victoria School 23/4P/6092/1 10 The structure of a molecule of a compound containing carbon, nitrogen and hydrogen is shown below. What is the molecular formula of this compound? A CN3H7 B CN3H9 C C3H7N D C3H9N 11 What is the total number of bonded and unbonded electrons in a molecule of carbon dioxide? bonded electrons unbonded electrons A B C D 4 4 8 8 0 8 8 14 12 The equation shows the reaction between element X and dilute sulfuric acid. 2X(s) + H2SO4(aq) → X2SO4(aq) + H2(g) What types of bonding are present in element X and in compound X2SO4? element X compound X2SO4 A B C D covalent covalent metallic metallic covalent ionic and covalent covalent ionic and covalent 13 An element burns in air to form a compound which dissolves in dilute hydrochloric acid and aqueous sodium hydroxide. What is the element? A carbon B iron C lead D sodium

6 © Victoria School 23/4P/6092/1 14 A solution of barium hydroxide was titrated with dilute sulfuric acid from a burette. The electrical conductivity of the mixture was measured as dilute sulfuric acid was added until in excess. Which graph shows the change in electrical conductivity over time? A B C D 15 Glass is silicon dioxide. Which of the following chemicals can be added into sewage pipes to dissolve glass fragments trapped in them? A aqueous sodium hydroxide B dilute sulfuric acid C ethanol D tetrachloromethane conductivity probe dilute sulfuric acid barium hydroxide solution conductivity volume of dilute sulfuric acid conductivity volume of dilute sulfuric acid conductivity volume of dilute sulfuric acid conductivity volume of dilute sulfuric acid

7 © Victoria School 23/4P/6092/1 16 Which ionic equation describes the reaction between solutions of ammonium carbonate and sodium hydroxide? A H + + OH - → H2O B 2H + + CO3 2- → CO2 + H2O C 2Na + + CO3 2- → Na2CO3 D NH4 + + OH - → NH3 + H2O 17 The diagram shows the steps to prepare lead(II) chloride from lead(II) carbonate. Which of the following is not a step in the preparation of lead( II) chloride from lead( II) carbonate? A add lead(II) carbonate until no more can dissolve B heat lead(II) nitrate solution until it is saturated C remove excess lead(II) carbonate by filtration D wash lead(II) chloride with some deionised water 18 Dilute nitric acid reacts with aqueous potassium hydroxide to form a salt and water. The graph shows how the pH changes as dilute nitric acid is added to aqueous potassium hydroxide. At which point are both dilute nitric acid and salt present? lead(II) carbonate lead(II) nitrate solution lead(II) chloride dilute nitric acid dilute hydrochloric acid pH A 14 B C 7 D 1 volume of dilute nitric acid / cm3

8 © Victoria School 23/4P/6092/1 19 Some chemical tests were performed on a sample of polluted gas and the results are shown below. 1 white precipitates formed in limewater 2 moist blue litmus paper turned red 3 acidified potassium manganate(VII) was decolourised What gases could be in the sample? A carbon dioxide and sulfur dioxide B carbon mono