BGSS 2024 P2 QP & ANS

Name: Register Number: Class: 4E BEDOK GREEN SECONDARY SCHOOL Preliminary Examination 2024 4E CHEMISTRY 6092/01 Paper 1 Multiple Choice 27 August 2024 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Do not open this booklet until you are told to do so. Write your name, register number and class on the multiple choice answer sheet provided. Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. 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 to be correct and record your choice in soft pencil on the separate Answer Sheet. Read very carefully the instructions on the Answer Sheet very carefully . INFORMATION FOR CANDIDATES 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 15. The use of an approved scientific calculator is expected, where appropriate. This document consists of 15 printed pages including the cover page. © BGSS 2024 No part of this document may be reproduced in any form or transmitted in any form or by any means without the prior permissio n of Bedok Green Secondary School [Turn Over

2 ©BGSS 2024 [Turn Over 1 The diagram shows an experimental setup for the preparation and collection of a dry gas. Which gas can be collected in this way? A oxygen B carbon dioxide C chlorine D sulfur dioxide 2 An organic solvent, hexane and aqueous sodium chloride are accidentally mixed together. Which of the following shows the most efficient methods of separation to obtain pure samples of hexane and solid sodium chloride? A filtration followed by crystallisation B fractional distillation followed by evaporation to dryness C simple distillation followed by crystallisation D using a separating funnel followed by evaporation to dryness fused calcium chloride

3 ©BGSS 2024 [Turn Over 3 The diagram shows a setup to distil a mixture of propanol (boiling point 88 °C) and heptane (boiling point 98 °C). Which graph correctly shows the changes in volume of distillate in the conical flask as the distillation proceeds? A B C D 4 When 50 cm3 of pure ethanol is mixed with 50 cm3 of pure water in a measuring cylinder, the total volume of mixture is found to be 97 cm3. What is the best explanation for this observation? A A small volume of the ethanol has evaporated. B The ethanol and water molecules react to form another compound. C The ethanol molecules have a random arrangement in water. D The ethanol molecules move into empty spaces betwe