BMSS Prelim P1

Class Index Number Name BUKIT MERAH SECONDARY SCHOOL END-OF-YEAR EXAMINATION 2024 SECONDARY 4 EXPRESS CHEMISTRY 6092/01 Paper 1 Multiple Choice 21 August 2024 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your class, index number and name on all the work you hand in. 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 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 in this question paper. A copy of the Periodic Table is printed on page 18. The use of an approved scientific calculator is expected, where appropriate. This document consists of 17 printed pages and 1 blank page. Setter: Ms Jacqueline How [Turn over

2 JH/BMSS/2024/4EXP/PRELIM/6092/01 [Turn over 1 A gas dissolves readily in water, turns moist blue litmus paper red, and is denser than air. Which set-up should be used to dry and collect this gas? 2 Hexane and water are immiscible liquids. Which method could be used to separate a mixture of hexane and water and how is the purity of the separated hexane checked? method of separation purity check A filtration find the boiling point B filtration by sublimation C use a separating funnel find the boiling point D use a separating funnel by sublimation

3 JH/BMSS/2024/4EXP/PRELIM/6092/01 [Turn over 3 Under the same conditions, which of the following gases would diffuse at the same rate as ethene? 1 carbon monoxide 2 carbon dioxide 3 ethane 4 nitrogen A 1 and 3 only B 1 and 4 only C 2 and 3 only D 2 and 4 only 4 The boiling points of four substances found in air are given in the table. Air is cooled to –190 °C such that some substances condense into liquid. When the temperature is then raised, which liquid would turn into a gas first? substance boiling point / oC A argon –186 B carbon dioxide –78 (sublimes) C nitrogen –196 D oxygen –183 5 Excess aqueous ammonia is added to a solution containing aluminium ions, copper(II) ions and zinc ions. The mixture is then filtered. Which ion(s) will be found in the resulting residue? A aluminium ions B aluminium ions and zinc ions C copper(II) ions D copper(II) ions and zinc ions

4 JH/BMSS/2024/4EXP/PRELIM/6092/01 [Turn over 6 Which reagent(s) can be used to distinguish between aqueous zinc nitrate and aqueous calcium chloride? 1. aqueous sodium carbonate 2. aqueous lead(II) nitrate 3. dilute sulfuric acid A 1 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3 7 Which set of three particles have the same total numbe