2023 MSHS Chem Prelims P1

Class/ Index Number / Centre Number/ ‘O’ Level Index Number / Name MARIS STELLA HIGH SCHOOL PRELIMINARY EXAMINATION SECONDARY FOUR CHEMISTRY 6092/01 Paper 1 Multiple Choice 30 August 2023 1 hour Additional Materials: Optical Test Answer Sheet (OTAS) – 1 sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your class, index number, Centre number, O level index number and name 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 answer 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 in this question booklet. A copy of the Periodic Table is printed on page 16. The use of an approved scientific calculator is expected, where appropriate. The total number of marks for this paper is 40. At the end of the examination, hand in the following separately: (1) Optical Test Answer Sheet (OTAS)
 (2) Question Paper This document consists of 16 printed pages.

2 1 Gases produced in chemical reactions can be collected for future usage. An experiment was conducted where reactants were placed into a conical flask and the gas produced was collected using displacement of water method as shown below. Which of the following reactions is this method not suitable? A decomposition of aqueous hydrogen peroxide B decomposition of calcium carbonate C reacting magnesium metal with dilute sulfuric acid D reacting ammonium chloride and dilute potassium hydroxide 2 Which of the following pairs of substances can be separated by heating? A ammonium chloride and sodium chloride B ammonium chloride and solid iodine C magnesium oxide and silver carbonate D magnesium oxide and copper

3 3 The diagram below shows a burning candle. Which of the following shows the correct description of the movement of the particles in (1), (2) and (3)? (1) (2) (3) A particles move randomly in any direction particles vibrate in fixed positions particles can rotate and slide over one another B particles move randomly in any direction particles can rotate and slide over one another particles vibrate in fixed positions C particles can rotate and slide over one another particles move randomly in any direction particles vibrate in fixed positions D particles vibrate in fixed positions particles can rotate and slide over one another particles move randomly in any direction 4 Chromatography was used to separate a mixture containing two dyes. The Rf values of two dyes are given in the following table. dye X Y Rf 0.60 0.40 If dye X moves a distance of 9 cm from the starting