Temasek 2024_Prelim_O_Chem_P1_QP

No part of the paper is to be reproduced without the approval of the Principal of Temasek Secondary School. TEMASEK SECONDARY SCHOOL Preliminary Examination 2024 Secondary 4 Express CHEMISTRY 6092/01 Paper 1 Multiple Choice 1 hour Additional Material: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, index number and class on the Multiple Choice Answer Sheet. 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 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 17. The use of an approved scientific calculator is expected, where appropriate. This document consists of 17 printed pages and 1 blank page.

2 No part of the paper is to be reproduced without the approval of the Principal of Temasek Secondary School. 1 Methanol and ethanoic acid can react to give methyl ethanoate using the set - up below. condenser water methanol and ethanoic acid What is the purpose of the condenser in this set-up? A To prevent the methanol from reacting with the oxygen in the air. B To prevent the methanol and ethanoic acid from escaping from the reaction mixture. C To separate methyl ethanoate from the methanol and ethanoic acid. D To lower the temperature to prevent decomposition of methyl ethanoate. 2 Calcium sulfate can be made by adding 20 cm3 of aqueous calcium nitrate to dilute sulfuric acid. 1 2 3 4 5 Which pieces of apparatus are needed to obtain calcium sulfate from aqueous calcium nitrate and dilute sulfuric acid? A 1, 2 and 4 B 1, 2 and 5 C 2, 3 and 4 D 2, 4 and 5

3 No part of the paper is to be reproduced without the approval of the Principal of Temasek Secondary School. 3 Four statements about a mixture containing X, Y and Z are given. 1 X and Y are miscible liquids. 2 Z is soluble in X but not in Y. 3 Y has a lower boiling point than X or Z. 4 Z will decompose upon heating. Which row correctly lists the steps