2024 Kranji Sec Pure Chem P1

Candidate Name: __________________________ ( ) Class: _______ KRANJI SECONDARY SCHOOL Preliminary Examination Secondary 4 Express CHEMISTRY 6092/01 Paper 1 Multiple Choice Wednesday 28 August 2024 1 hour KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST There are forty questions in this paper. Answer all questions. For each question there are four possible answers, A, B, C and D. Choose the one you consider to be correct and record your choice in soft pencil on the separate 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 18. The use of an approved scientific calculator is expected, where appropriate. Set by: Mrs Toh-Chong Keting This Question Paper consists of 18 printed pages. [Turn over 4E Session 2

2 1 Which piece of apparatus could be used to determine the end -point of the reaction between hydrochloric acid and potassium hydroxide? A electronic balance B gas syringe C stopwatch D thermometer 2 A student is provided with two drying agents: concentrated sulfuric acid and calcium oxide. Which method should he use to collect a sample of dry carbon dioxide gas? A B C D 3 The diagram shows the chromatogram obtained by analysis of a single dye. Three measurements are shown in the diagram below. How is the Rf value of the dye calculated? A x/(x+y) B y/(y+z) C y/(x+y+z) D z/(x+y+z) solvent front solvent level start line z cm x cm y cm

3 [Turn over 4 The labels fell off two bottles each containing a colourless solution, one of which was sodium carbonate solution and the other was sodium chloride solution. Which of the following tests would allow for the identification of the solutions? A addition of aqueous ammonia B addition of dilute nitric acid C addition of lead(II) nitrate solution D addition of sodium hydroxide solution 5 Two solutions, W and X, were tested as shown. W X dilute sulfuric acid no visible reaction no visible reaction dilute nitric acid added, th