Jurongville 2024 Prelim 4E Chemistry Paper 1

JVSS Prelim 2024 4E Chemistry 6092/01 [Turn over JURONGVILLE SECONDARY SCHOOL PRELIMINARY EXAMINATION 2024 Secondary 4 Express STUDENT NAME CLASS INDEX NUMBER CHEMISTRY 6092/01 Paper 1 Multiple Choice 07 August 2024 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, class and index number in the spaces at the top of this page. 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. 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 15. The use of an approved scientific calculator is expected, where appropriate. DO NOT OPEN THE BOOKLET UNTIL YOU ARE TOLD TO DO SO This document consists of 15 printed pages. Setter: Ms Ethel Chng For Examiner’s Use 40

2 JVSS Prelim 2024 4E Chemistry 6092/01 1 The setup used to dry gas Q is shown. What can be deduced about gas Q? A Gas Q is denser than air. B Gas Q is either acidic or neutral. C Gas Q is insoluble in water. D Gas Q is soluble in concentrated sulfuric acid. 2 The diagram shows a method of measuring the rate of reaction. Which reaction is not suitable for using this method to measure its rate? A C6H12O6 → 2C2H5OH + 2CO2 B CaCO3 + 2HCl → CaCl2 + H2O + CO2 C Mg + 2HCl → MgCl2 + H2 D NaOH + NH4Cl → NaCl + NH3 + H2O 3 A food colouring is analysed by paper chromatography. From its chromatogram, what is the Rf value of the least soluble dye? A 0.25 B 0.30 C 0.35 D 0.40 moist gas Q in concentrated sulfuric acid dry gas Q out solvent front start 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 ● ●

3 JVSS Prelim 2024 4E Chemistry 6092/01 [Turn over 4 From which mixture can the first substance be obtained by adding water, stirring and filtering? A copper and copper(II) chloride B iodine and magnesium carbonate C silicon dioxide and zinc oxide D sodium chloride and sodium sulfate 5 A chemist is given an unknown white powder. What should the chemist do to determine the purity of the unknown substance? A burn it in excess oxygen B conduct a solubility test in water C measure its melting point D pass electricity through it 6 An aqueous solution contains a mixture of Cl−, CO32− and SO42− ions. Which aqueous reagent can be added to remove only CO32− ions from the mixture? A AgNO3 B Ba(NO3)2 C HNO3 D NaOH 7 The diagrams represent the arrangement of particles in substance T at t