2022 CHR Chem Prelims P1

CHR 2022/Chemistry 6092/01/O/22 [Turn over CHRIST CHURCH SECONDARY SCHOOL 2022 PRELIMINARY EXAMINATION FOUR EXPRESS CHEMISTRY 6092/01 Paper 1 15 July 2022 1 hour Additional Materials: Multiple Choice Answer Sheet 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, highlighters, 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 14. The use of an approved scientific calculator is expected, where appropriate. This document consists of 14 printed pages. CANDIDATE NAME CLASS CENTRE NUMBER S INDEX NUMBER ��

CHR 2022/Chemistry 6092/01/O/22 2 1 Which one of the following correctly describes the particles in a dilute sugar solution at room temperature? sugar molecules water molecules A widely separated, moving at random close together, moving at random B widely separated, moving at random close together, not moving C widely separated, not moving widely separated, moving at random D close together, moving at random widely separated, vibrating slightly 2 The tubes shown in the diagram all contain a dilute solution of a solid X dissolved in a liquid Y. Which apparatus is most suitable for finding the boiling point of liquid Y? A B C D 3 The diagram shows some ammonium chloride being heated. What does the clear region between the ammonium chloride and the white deposit contain? A ammonia and chlorine B ammonia and hydrogen chloride C ammonia and water vapour D ammonium chloride vapour white deposit clear region ammonium chloride heat ��

CHR 2022/Chemistry 6092/01/O/22 [Turn over 3 4 The percentage of oxygen in the air is found by using the apparatus shown below. The air is passed over heated copper until there is no further decrease in volume. What precaution should be taken before the initial volume of air and final volume of gases remaining in the apparatus are found? A The tube containing the copper should be removed. B Both syringes should contain the same volume of air. C All the copper should have reacted. D The apparatus should be at room temperature. 5 Which of the following shows the structure of bronze? A B C D 6 Naturally-occurring bromine has a relative atomic mass of 80 and consists entirely of two isotopes of relative atomic masses 79 and 81. What can be deduced about naturally-occurring bromine from this information only? A Bromine is radioactive. B Bromine has different oxidation states. C Bromine isotopes have different number of protons. D Bromine contains the two isotopes in equal proportions. gas syringe gas syringe copper air heat ��

CHR 2022/Chemistry 6092/01/O/22 4 7 Silicon carbide is a shiny, hard, chemically inert material with a very high melting point. It can be used to sharpen knives and make crucibles. Which type of structure explains these properties? A a giant structure with covalent bonds between carbon and silicon atoms B a giant structure containing metallic bonds C a giant structure with covalent bonds between atoms and weak forces of attraction between the layers of atoms D a simple molecular structure with covalent bonds between the carbon and silicon atoms 8 The diagram shows the structure of a covalent compound containing the element hydrogen, H, and the unknown elements X, Y and Z. To which groups of the Periodic Table do these three elements, X, Y and Z, belong? X Y Z A 1 5 6 B 4 5 1 C 4 6 5 D 5 1 4 9 What does a solution of hydrogen chloride and methylbenzene contain? A methylbenzene ions, hydrogen ions and chloride ions B methylbenzene ions and hydrogen chloride molecules C methylbenzene molecules, hydrogen molecules and chlorine molecules D methylbenzene molecules and hydrogen chloride molecules 10 Which one of the following substances (i) is an element (ii) also forms crystals composed of small molecules? A carbon dioxide B ice C iodine D graphite ��

CHR 2022/Chemistry 6092/01/O/22 [Turn over 5 11 The table below shows the results of experiments to measure the volume of sulfuric acid (column 1) needed to neutralise the mass of sodium hydroxide (column 2) dissolved in the volume of water (column 3). experiment column 1 column 2 column 3 volume of sulfuric acid required / cm3 mass of sodium hydroxide / g volume of water required / cm3 1 20 1 20 2 40 2 40 3 40 2 20 4 ? 1 40 From the results, what volume of sulfuric acid is needed to neutralise the sodium hydroxide in experiment 4? A 10 cm3 B 20 cm3 C 40 cm3 D 80 cm3 12 Dinitrogen tetroxide, N 2O4 is a poisonous gas. It can be disposed of safely by reaction with sodium hydroxide. In the experiment, the concentration of aqueous sodium hydroxide used is 1.5 mol/dm3. N2O4(g) + 2NaOH(aq) → NaNO3(aq) + NaNO2(aq) + H2O(l) What is the least volume of aqueous sodium hydroxide required to dispose of 300 cm3 of N2O4 at room temperature and pressure? A 10 cm3 B 20 cm3 C 120 cm3 D 240 cm3 13 An element X in found in Group VII of the Periodic Table. Which of the following is a likely behaviour of element X? A reacts vigorously with water B forms a hydride of formula XH7 C reduces hydrogen sulfide D oxidises SO32- to SO42- 14 250 cm 3 of 3.00 mol/dm 3 dilute hydrochloric acid is added to 350 cm 3 of 2.00 mol/dm 3 dilute hydrochloric acid. What is the concentration of the resulting solution? A 1.45 mol/dm3 B 2.42 mol/dm3 C 2.50 mol/dm3 D 8.33 mol/dm3 ��

CHR 2022/Chemistry 6092/01/O/22 6 15 The table below shows the results of heating the carbonates and nitrates of three metals to the same temperature. metal products of decomposition metal carbonate metal nitrate W no change metal nitrite and oxygen X oxide and carbon dioxide metal oxide, nitrogen dioxide and oxygen Y no change metal oxide, nitrogen dioxide and oxygen What is the order of these metals in the reactivity series likely to be? most reactive least reactive A W X Y B W Y X C X Y W D Y W X 16 Nickel is between iron and lead in the reactivity series. Which of the following can be deduced from this? A Nickel can be obtained by moderate heating of nickel hydroxide. B Nickel can displace hydrogen rapidly from hot water. C Nickel can be displaced from an aqueous solution containing nickel ions. D Nickel loses electro