2024 CHIJ Sec 4E Prelim Chemistry P1

CHIJSec/2024/OLevelPrelim/6092/01 [Turn over O CONVENT OF THE HOLY INFANT JESUS SECONDARY Preliminary Examination in preparation for the General Certificate of Education Ordinary Level 2024 CANDIDATE NAME CLASS REGISTER NUMBER CHEMISTRY Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet 6092/01 26 August 2024 1 hour READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, class and register number on the Multiple Choice Answer Sheet 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 on the question paper. 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.

2 CHIJSec/2024/OLevelPrelim/6092/01 1 A laboratory assistant has a mixture of solid sulfur and solid carbon. Sulfur is very soluble in carbon disulfide (boiling point 46°C) and slightly soluble in water. Carbon is insoluble in both solvents. A sample of the mixture is shaken with water. This is P. Another sample of the mixture is shaken with carbon disulfide. This is Q. Which procedure is used to prepare a pure sample of sulfur? A P is distilled and the distillate is evaporated to dryness to obtain sulfur. B P is filtered and the filtrate is allowed to evaporate to dryness to obtain sulfur. C Q is filtered and the residue is allowed to evaporate to dryness to obtain sulfur. D Q is filtered and the filtrate is allowed to evaporate to dryness to obtain sulfur. 2 A student was given 4.0 g of magnesium carbonate powder and 100 cm 3 of 0.1 mol/dm 3 hydrochloric acid. He wants to determine the rate of reaction by measuring the change in mass of the reaction mixture. Which apparatus is not likely to be used in this experiment? A conical flask B electronic mass balance C stopwatch D test-tube 3 In which situations do the particles move closer together? 1 A gas is heated from 0 C to 25 C. 2 The pressure of a gas is increased. 3 Steam condenses to form water. 4 Water evaporates at room temperature. A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

3 [Turn over CHIJSec/2024/OLevelPrelim/6092/01 4 Two bottles are placed close together inside a large container at a temperature of 90 °C. One bottle contains 1.0 g of sulfur dioxide, the other bottle contains 1.0 g of ethanol. compound melting point / °C boiling point / °C ethanol –114 78 sulfur dioxide –72 –10 A detector is placed in the container 2.0 m away from the two bottles. The two bottles are opened at the same time. Which row is correct? 5 The letters X, Y and Z represent different atoms. X17 37 Y18 37 Z18 38 Which statement is correct? A X and Y are the same element. B X and Y have same number of neutrons. C Y and Z have the same number of electrons. D Z has more neutrons than X. 6 Why does magnesium oxide have a higher melting point than sodium chloride? A There are more delocalised electrons in magnesium than sodium. B There are more ions in magnesium oxide than in sodium chloride. C The electrostatic forces of attraction between magnesium and oxide ions are stronger than those between sodium and chloride ions. D The intermolecular forces of attraction between magnesium oxide are stronger than those between sodium chloride. compound that reaches detector first explanation A ethanol ethanol has a lower Mr than sulfur dioxide B ethanol liquids diffuse faster than gases C sulfur dioxide gases diffuse faster than liquids D sulfur dioxide ethanol has a higher Mr than sulfur dioxide

4 CHIJSec/2024/OLevelPrelim/6092/01 7 A stable molecule containing atoms of phosphorus, X, and Y have the following structure. What elements could X and Y be? X Y A C H B N Cl C O Cl D Si H 8 Which statement is true regarding diamond and graphite? A Both can conduct electricity. B Both have the same colour. C Both have the same crystalline form. D Both produce carbon dioxide and water vapour when completely burned in oxygen. 9 A compound contains 52% carbon, 13% hydrogen and 35% oxygen by mass. What is the empirical formula of the compound? A CH3COOH B CH3OH C C2H5OH D C4H13O2 10 Ethane burns in oxygen according to the chemical equation: 2C2H6 + 7O2 → 4CO2 + 6H2O 4 dm3 of ethane and 16 dm3 of oxygen were ignited in a reaction vessel. After the reaction, the reaction vessel was cooled down to room temperature. What is the final volume of gases present in the vessel? A 8 dm3 B 10 dm3 C 20 dm3 D 22 dm3 X P Y Y P P Y X X Y Y Y

5 [Turn over CHIJSec/2024/OLevelPrelim/6092/01 11 68 g of hydrogen peroxide is dissolved in water to form an aqueous solution. The solution is heated and decomposed in the presence of manganese( IV) oxide to give 3.6 dm 3 of oxygen gas as follows. 2H2O2 → O2 + 2H2O What is the percentage purity of hydrogen peroxide? A 2.5% B 5.0% C 10.0% D 15.0% 12 Which two oxides will react with sodium hydroxide solution? A calcium oxide and zinc oxide B phosphorus(III) oxide and lead(II) oxide C copper(II) oxide and sulfur dioxide D sulfur dioxide and magnesium oxide 13 Which statement about the reaction between ammonium carbonate and dilute hydrochloric acid is false? A Ammonium chloride is produced. B Ammonia gas is produced. C The gas evolved turned damp blue litmus paper red. D Water is produced. 14 Which salt can be prepared by adding excess carbonate to dilute acid? A lead(II) chloride B magnesium chloride C potassium nitrate D sodium sulfate

6 CHIJSec/2024/OLevelPrelim/6092/01 15 Which graph shows the changes in pH as an excess of hydrochloric acid is added to aqueous sodium hydroxide? 16 Calcium nitrate solution is added to filtered tap water. A white precipitate forms. Which ion present in the tap water causes the precipitate to form? A chloride B magnesium C potassium D sulfate 17 Which statement about the manufacture of ammonia in the Haber process is incorrect? A A 100% yield of ammonia will not be obtained in the reaction. B High pressure is used to increase the yield of ammonia. C Iron is used to increase the yield of ammonia. D Nitrogen is obtained from fractional distillation of liquid air. volume of acid added volume of acid added volume of acid added volume of acid added

7 [Turn over CHIJSec/2024/OLevelPrelim/6092/01 18 A solution of compound Z reacts with sodium hydroxide solution to form a white precipitate that is insoluble in excess sodium hydroxide solution. Aluminium powder is then added. The mixture is heated and a gas that turns damp red litmus paper blue is given off. What could the identity of Z be? A aluminium chloride B ammonium chloride C calcium nitrate D zinc nitrate 19 Which reagent could be used to distinguish between dilute sulfuric acid and dilute hydrochloric acid? A barium nitrate solution B calcium carbonate C universal indicator D s