2024 Zhenghua Prelim QP

Paper 1 Multiple Choice 27 August 2024 1 hour Additional Materials: Multiple Choice Answer Sheet Zhenghua Secondary School Zhenghua Secondary School Zhenghua Secondary School Zhenghua Secondary School Zhenghua Secondary School Zhenghua Secondary School Zhenghua Secondary School Zhenghua Secondary School Zhenghua Secondary School Zhenghua Secondary School Zheng hua Secondary School Zhenghua Secondary School Zhenghua Secondary School Zhenghua Secondary School Zhenghua Secondary School Zhenghua Secondary School Zhenghua Secondary School Zhenghua Secondary School Zhenghua Secondary School Zhenghua Secondary School READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, Centre number and index number on the Answer Sheet in the spaces provided. There are forty questions on this paper. Answer all questions. For each question, there are four possible answers, A, B, C or 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 booklet. A copy of the Periodic Table is printed on page 18. The use of an approved scientific calculator is expected, where appropriate. Name of Setter: Ms Tan Li Er Natalie This document consists of 18 printed pages including this cover page. [Turn over ZHENGHUA SECONDARY SCHOOL PRELIMINARY EXAMINATION 2024 SECONDARY FOUR EXPRESS CHEMISTRY 6092/01 Candidate Name: _____________________________ Index No: _____ Class: _________

2 1 Aqueous sodium hydroxide is neutralised by dilute hydrochloric acid in a titration. 25.0 cm 3 of aqueous sodium hydroxide is measured into a conical flask using a ...1... and a few drops of methyl orange indicator is added to the solution. The dilute hydrochloric acid is added to the conical flask using a ...2... . The end-point is reached when the methyl orange indicator turns ...3... . Which words correctly complete blanks 1, 2 and 3? 1 2 3 A burette pipette red B burette pipette orange C pipette burette orange D pipette burette red 2 Chromatogram 1 shows the separation of coloured inks in mixture Q, using solvent A. Chromatogram 2 shows the separation using the same piece of paper in another solvent B after it has been rotated 90° anti-clockwise. chromatogram 1 chromatogram 2 first starting line How many different types of ink are present in mixture Q? A 3 B 4 C 6 D 7 rotate 90° anti-clockwise second starting line Q Q

3 3 An element, Z, has p protons and n neutrons in the nucleus of its atoms. Z