2025 Christ Church Prelim 2025 P1 QP

CHR 2025/Chemistry 6092/01/O/25 [Turn over CHRIST CHURCH SECONDARY SCHOOL 2025 PRELIMINARY EXAMINATION SECONDARY FOUR EXPRESS CHEMISTRY 6092/01 Paper 1 26 August 2025 1 hour Candidates answer on the Question Paper Additional Materials: OTAS Paper READ THESE INSTRUCTIONS FIRST Write your Centre number, index number, name and class on all the work you hand in. Write in soft pencil on the Multiple Choice Answer Sheet 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 you consider correct and record your choice in soft pencil on the separate Multiple Choice 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 Periodic Table is printed on page 16. The use of an approved scientific calculator is expected, where appropriate. This document consists of 16 printed pages. CANDIDATE NAME CLASS CENTRE NUMBER S INDEX NUMBER

CHR 2025/Chemistry 6092/01/O/25 2 1 The apparatus shown in the diagram below was set up by a student to measure the volume of carbon dioxide gas made when different masses of marble chips were added to 25 cm3 of dilute hydrochloric acid. Which other apparatus did he use for his experiment? A filter funnel and mass balance B filter funnel and stopwatch C measuring cylinder and mass balance D measuring cylinder and stopwatch 2 Gas W was collected using displacement of air by downward delivery, and then placed in the set-up below. After a short while, the water level in column Z was observed. Which observations(s) could possibly be made about the water level in column Z? I Water level increased. II Water level remained the same. III Water level decreased, then increased. A I only B II only C I and II D II and III gas W methane porous pot Z gas syringe rubber bung marble chips 25 cm3 dilute hydrochloric acid

CHR 2025/Chemistry 6092/01/O/25 [Turn over 3 3 Two identical bottles, A and B are filled with gases X and Y respectively. They were then put on a balance at room temperature and pressure. The result is shown below Which of the following statements is correct? A The number of gas particles in bottle A is greater than the number of gas particles in bottle B. B The number of moles of gas particles in bottle A is greater than the number of moles of gas particles in bottle B. C The molar mass of gas particles in bottle A is greater than the molar mass of gas particles in bottle B. D The molar volume of gas particles in bottle A is greater than the molar volume of gas particles in bottle B. 4 The boiling points of some gases present in air are given in the table below. gas nitrogen oxygen argon xenon boiling point / oC -196 -182 -186 -108 A mixture containing liquefied air at -200 oC is fractionally distilled. Which one of the following would still remain as a liquid when the temperature is increased by 15 oC? A nitrogen and argon B oxygen and argon C oxygen and xenon D argon, oxygen and xenon bottle A bottle B gas X gas Y

CHR 2025/Chemistry 6092/01/O/25 4 3 Two identical bottles, A and B are filled with gases X and Y respectively. They were then put on a balance at room temperature and pressure. The result is shown below Which of the following statements is correct? A The number of gas particles in bottle A is greater than the number of gas particles in bottle B. B The number of moles of gas particles in bottle A is greater than the number of moles of gas particles in bottle B. C The molar mass of gas particles in bottle A is greater than the molar mass of gas particles in bottle B. D The molar volume of gas particles in bottle A is greater than the molar volume of gas particles in bottle B. 4 The boiling points of some gases present in air are given in the table below. gas nitrogen oxygen argon xenon boiling point / oC -196 -182 -186 -108 A mixture containing liquefied air at -200 oC is fractionally distilled. Which one of the following would still remain as a liquid when the temperature is increased by 15 oC? A nitrogen and argon B oxygen and argon C oxygen and xenon D argon, oxygen and xenon bottle A bottle B gas X gas Y

CHR 2025/Chemistry 6092/01/O/25 [Turn over 5 5 J is an element found in the Periodic Table. Which of the following cannot be deduced from the information provided only? A Element J can likely be found in Group 2 of the Periodic Table. B Element J has two isotopes that have different physical properties. C The atomic radius of J is bigger than its ionic radius. D The ion of J can be attracted to any oppositely charged ion. 6 The figure below shows a molecule of an herbicide called 2,4,5 -T which is often used for weed control. How many pairs of shared electrons are present in one molecule of the herbicide? A 12 B 15 C 20 D 23 7 In which of the following molecules are all the outer electrons of the atoms involved in bonding? A CH4 B CO2 C NH3 D HCl H H Cl Cl OCH2COOH Cl C C C C C C J 2+

CHR 2025/Chemistry 6092/01/O/25 6 8 The table below shows the information about the chlorides of some elements in Period 3 of the Periodic Table. element formula of main chloride bonding present in chloride pH of resulting solution when dissolved in water sodium NaCl ionic 7 magnesium MgCl2 ionic 7 aluminium AlCl3 covalent 3 phosphorus PCl3 covalent 2 sulfur S2Cl2 covalent 2 What will be the bonding present in the chloride of silicon and the pH value of the resulting solution when the chloride is dissolved in water? bonding present in chloride pH of resulting solution when dissolved in water A covalent 2 B covalent 7 C ionic 2 D ionic 7 9 The table below shows some physical properties of substances P, Q, R and S. substance melting point / oC electrical conductivity in solid state in molten state P high poor good Q high good good R high poor poor S low poor poor Which of the following statements is true about substances P, Q, R and S? A Substance P contains mobile electrons to conduct electricity when in molten state. B Substance Q consists of strong electrostatic attractions between oppositely charged particles. C Substance R consists of weak bonds between the atoms. D Substance S exists in a simple molecular structure. 10 Which of the following is true of graphite and copper? A They both contain strong forces of attraction between oppositely charged ions. B They both have giant covalent structure. C They can conduct electricity in the solid state due to mobile delocalised electrons. D They have high melting points due to strong covalent bonds.

CHR 2025/Chemistry 6092/01/O/25 [Turn over 7 11 Compound X is made up of two elements, metal Y and non -metal Z. Compound X has a giant lattice structure where each negative ion is surrounded by four positive ions while each positive ion is surrounded by eight negative ions. Which of the following s