2025 TKGS Chemistry Prelim Paper 1 QP

Tanjong Katong Girls’ School 1 Sec 4 Preliminary Examination 2025 1 TANJONG KATONG GIRLS’ SCHOOL PRELIMINARY EXAMINATION SECONDARY FOUR EXPRESS CHEMISTRY CANDIDATE NAME CLASS 4 INDEX NUMBER CHEMISTRY 6092/01 Paper 1 Multiple Choice 22 August 2025 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 name, Centre number and index number on the Answer Sheet in the spaces provided unless this has been done for you. Do NOT WRITE on ANY BARCODES. 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 booklet. 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 18 printed pages.

Tanjong Katong Girls’ School Sec 4 Preliminary Examination 2025 2 1 Sulfur dioxide gas can be prepared by heating sodium sulfite with hydrochloric acid. Which set of apparatus is suitable for preparing and collecting a dry sample of sulfur dioxide? 2 A student wants to separate a mixture of iodine and sodium chloride. Which method should she use? A Crystallisation B Sublimation C Filtration D Distillation

Tanjong Katong Girls’ School Sec 4 Preliminary Examination 2025 3 3 X, Y and Z are all mixture of alcohols. A paper chromatogram is obtained for samples of X, Y and Z. Which row is correct? statement 1 statement 2 A Z contains no more than four alcohols X, Y and Z could contain the same alcohol B Z contains no more than four alcohols X, Y and Z could not contain the same alcohol C Z contains at least four alcohols X, Y and Z could contain the same alcohol D Z contains at least four alcohols X, Y and Z could not contain the same alcohol 4 What happens as ice melts at 0ºC? 1 Molecules gain kinetic energy and temperature increases. 2 Energy is gained to overcome the intermolecular forces of attraction. 3 Molecules gain sufficient energy to move from fixed positions. A 1 only B 1 and 2 only C 1 and 3 only D 2 and 3 only

Tanjong Katong Girls’ School Sec 4 Preliminary Examination 2025 4 5 Which gas diffuses most rapidly under the same conditions of temperature and pressure? A Cl2 B CO2 C CH4